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While it costs about the same to run nuclear plants as other

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While it costs about the same to run nuclear plants as other [#permalink]

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21 Jun 2012, 02:55
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The Official Guide for GMAT Review 2015

Practice Question
Question No.: SC 107
Page: 691

While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

(A) While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

(B) While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.

(C) Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.

(D) It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.

(E) The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.
[Reveal] Spoiler: OA

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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There are two distinct splits here, as you may see; one is the comparison of the costs to run a nuclear plant with just the other types of plants and not their running costs. The second split is the ambiguity of the pronouns, precisely the –third - it in the original. Of course the other two it pronouns may be argued as passable as place holders.

A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity. ----- 1.faulty comparison; cost of running compared with other types of power plants 2. The third pronoun it is dangling without an antecedent. Makes what more expensive? Makes electricity more expensive to generate electricity 3. Costs that makes … A SV mismatch

B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
The comparison, the pronoun problem and the SV mismatch nicely fixed. Correct choice.

C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive. -----Though the comparison problems are fixed, costs and that makes is S-V mismatch.

D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.
Pronoun they is rather ambiguous; they may refer to either the nuclear or other types.

E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants. -------- Faulty comparison
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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16 Sep 2012, 23:39
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One more imp learning from this SC:

A costs the same as B- sub to sub comparison
The costs of running A is same for B---Obj to Obj comparison need Preposition
{Got this rule from Magoosh video so can rely on it }

Analysis based on above rules:
A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.->correct

Use of "makes " is wrong, Also "It is" in second clause is not needed [/color]

B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.->Correct

C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.-> wrong we don't need prep here

D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.--> wrong same as C

E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.----> wrong Need a preposition
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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13 Jan 2013, 12:10
daagh wrote:
There are two distinct splits here, as you may see; one is the comparison of the costs to run a nuclear plant with just the other types of plants and not their running costs. The second split is the ambiguity of the pronouns, precisely the –third - it in the original. Of course the other two it pronouns may be argued as passable as place holders.

A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity. ----- 1.faulty comparison; cost of running compared with other types of power plants 2. The third pronoun it is dangling without an antecedent. Makes what more expensive? Makes electricity more expensive to generate electricity 3. Costs that makes … A SV mismatch

B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
The comparison, the pronoun problem and the SV mismatch nicely fixed. Correct choice.

C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive. -----Though the comparison problems are fixed, costs and that makes is S-V mismatch.

D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.
Pronoun they is rather ambiguous; they may refer to either the nuclear or other types.

E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants. -------- Faulty comparison

Daagh,

Can you please clarify this -

'doesn't B change the meaning? B talks about the electricity becoming more expensive but the original sentence talks about it becoming more expensive for the plant to generate electricity. These are two different things'
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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16 Mar 2013, 04:38
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sujit2k7 wrote:
One more imp learning from this SC:

A costs the same as B- sub to sub comparison
The costs of running A is same for B---Obj to Obj comparison need Preposition
{Got this rule from Magoosh video so can rely on it }

B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.->Correct

Hi,
Can someone please clarify my doubt.
How ellipsis is playing its part over here. I understand that we either needs to use verb (in case of Subject to Subject comparison so that the comparison is not ambiguous) or apply preposition so as to make Object - Object comparison.

Here Object of preposition is {running nuclear plants} and {other types of power plants} -> how they both are logically parallel?
Request you to provide insights.

Thanks
H
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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16 Mar 2013, 10:22
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When expanded in full (with ellipsis in brackets), B will be
B While the cost of running nuclear plants is about the same as for (the cost of running) other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
The comparison is still between the costs of running one type with the costs for running other types. The only difference is that in the first case we are using ‘of’ as the preposition while in the second arm, we are using ‘for’. As long as we use a preposition for another acceptable preposition, the comparison can be considered be logical and parallel, IMO.

As far as B changing the meaning from the original, I feel the meaning is flawed. There is no way we can ascertain what the “it” stands for. The term ‘it’ does not convey clearly and logically the intended meaning. Hence we have to amend it. B is logical.
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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16 Mar 2013, 11:41

I understand that the answer B is best amongst all, and conveys the logical meaning perfectly.
However, I am still not convinced about the sentence structure. Can you please elaborate a bit more on your reasoning.

I tried to understand this concept by taking clues from MGMAT, but failed to do so. I would appreciate if someone can help me out.

Here is an example from MGMAT-
The incidence of the disease among men exceeds the incidence among women.
The incidence of the disease among men exceeds that among women.
Here, that is referring to incidence, per explanantion from MGMAT.

So, ellipsis should be -
The incidence of the disease among men exceeds that(of the disease) among women.
Now, going by same concept -

The cost of running nuclear plants is same as that for electric plants.
In the below sentence, what THAT is referring to . Is it "the cost" or "the cost of running".

If it is later, then why do we require an extra preposition?

The cost of running nuclear plants is same as {the cost of running }for electric plants.

Thanks
H

daagh wrote:
When expanded in full (with ellipsis in brackets), B will be
B While the cost of running nuclear plants is about the same as for (the cost of running) other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
The comparison is still between the costs of running one type with the costs for running other types. The only difference is that in the first case we are using ‘of’ as the preposition while in the second arm, we are using ‘for’. As long as we use a preposition for another acceptable preposition, the comparison can be considered be logical and parallel, IMO.

As far as B changing the meaning from the original, I feel the meaning is flawed. There is no way we can ascertain what the “it” stands for. The term ‘it’ does not convey clearly and logically the intended meaning. Hence we have to amend it. B is logical.

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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16 Mar 2013, 13:50
You see, leaving apart too many rules, we need to chose the answer which is best out of the given options. All other choices except for B, in the question above, have noticeable grammar issues. Quite unlike, Choice B, only uses an additional preposition, which if you notice, most other choices uses as well, so...we choose an option which overcomes other more critical grammar issues (the logical comparison and SV error)
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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16 Mar 2013, 21:54
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Yes, I do understand that Choice B is best amongst all, and this is what I have mentioned above as well.
But, I also acknowledge the fact that there is always something to learn from every correct official answer, and that learning should be carried forward. That is the only way to improve.

sdas wrote:
You see, leaving apart too many rules, we need to chose the answer which is best out of the given options. All other choices except for B, in the question above, have noticeable grammar issues. Quite unlike, Choice B, only uses an additional preposition, which if you notice, most other choices uses as well, so...we choose an option which overcomes other more critical grammar issues (the logical comparison and SV error)

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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18 Mar 2013, 14:01
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imhimanshu wrote:
I tried to understand this concept by taking clues from MGMAT, but failed to do so. I would appreciate if someone can help me out.

Here is an example from MGMAT-
The incidence of the disease among men exceeds the incidence among women.
The incidence of the disease among men exceeds that among women.
Here, that is referring to incidence, per explanantion from MGMAT.

So, ellipsis should be -
The incidence of the disease among men exceeds that(of the disease) among women.
Now, going by same concept -

The cost of running nuclear plants is same as that for electric plants.
In the below sentence, what THAT is referring to . Is it "the cost" or "the cost of running".

If it is later, then why do we require an extra preposition?

The cost of running nuclear plants is same as {the cost of running }for electric plants.

Thanks
H

Very interesting question Himanshu.
When you are dealing with ellipsis, it always helps to begin from the completely expanded version with all the words and then move your way to the abbreviated version by applying ellipsis along the way. I will do the same here:

Let's consider only the pertinent portion of the sentence.

1. The cost of running nuclear plants is about the same as the cost of running other types of power plants.
No issues here with the comparison. Both sides of the comparison are grammatically and logically parallel.

Now what if I replace "the cost of running" with "that". After it is obvious that we are comparing cost of running of the two categories of plants. But when I apply this ellipsis, I need something to connect "that" with "other types of power plants".

2. (Without connection with that)
The cost of running nuclear plants is about the same as that other types of power plants. WRONG

2. (with correct connection)
The cost of running nuclear plants is about the same as that for other types of power plants.
So this is where the preposition "for" comes from.

Now we continue with our ellipsis. We can indeed even omit "that" from here since this omission will not lead to any ambiguity.

3. The cost of running nuclear plants is about the same as for other types of power plants.

So this is how I get to the correct sentence containing "for".

Now let's apply the same on the set of sentences:
1. The incidence of the disease among men exceeds the incidence of the disease among women.
1 to 2 - The incidence of the disease among men exceeds the incidence of the disease among women.
2. The incidence of the disease among men exceeds the incidence among women.
2 to 3 - The incidence of the disease among men exceeds the incidence among women.
3. The incidence of the disease among men exceeds that among women.

So the key thing here is that as you replace or omit words, think about what connections you may need to get the correct sentence. The nature of the two sentences is different. In the Official sentence, the main component - cost of running - took direct object without the need of any preposition. So when we replaced this with "that" we needed a connection - i.e. a preposition. However, in the other example, the main component - incidence of the disease - itself needed a preposition to connect to the object and hence when we replaced it with "that" we did not need to get another preposition.

Thus when you cross-check your work in ellipsis, start from the complete sentence and then work your way to simplified version with replacement words and omitted words.

Hope this helps.

Regards,

Payal
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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18 Mar 2013, 18:56
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Thanks Payal for providing great insights.Kudos to you and your team.

So, preposition can be used in following two ways
1) For removing the ambiguity in the sentence, whether we are comparing subject or object.
e.g John is more interested in video games than {in} his girlfriend. Here, we are comparing objects of prepositions, and we need preposition to clarify the meaning else it will result in ambiguity.
2) The usage of prepositions is as mentioned by you. It could work as a connector with the ellipsis element(that).

2 to 3 - The incidence of the disease among men exceeds the incidence among women.
3. The incidence of the disease among men exceeds that among women.

One question - Can we clear off "that" in the final sentence.
i.e The incidence of the disease among men exceeds among women.

I believe, had the sentence been The incidence of the disease among men exceeds women., then the sentence would have been ambiguous, because then the comparison could be b/w the incidence vs women or men or women.

egmat wrote:
Very interesting question Himanshu.
When you are dealing with ellipsis, it always helps to begin from the completely expanded version with all the words and then move your way to the abbreviated version by applying ellipsis along the way. I will do the same here:

Let's consider only the pertinent portion of the sentence.

1. The cost of running nuclear plants is about the same as the cost of running other types of power plants.
No issues here with the comparison. Both sides of the comparison are grammatically and logically parallel.

Now what if I replace "the cost of running" with "that". After it is obvious that we are comparing cost of running of the two categories of plants. But when I apply this ellipsis, I need something to connect "that" with "other types of power plants".

2. (Without connection with that)
The cost of running nuclear plants is about the same as that other types of power plants. WRONG

2. (with correct connection)
The cost of running nuclear plants is about the same as that for other types of power plants.
So this is where the preposition "for" comes from.

Now we continue with our ellipsis. We can indeed even omit "that" from here since this omission will not lead to any ambiguity.

3. The cost of running nuclear plants is about the same as for other types of power plants.

So this is how I get to the correct sentence containing "for".

Now let's apply the same on the set of sentences:
1. The incidence of the disease among men exceeds the incidence of the disease among women.
1 to 2 - The incidence of the disease among men exceeds the incidence of the disease among women.
2. The incidence of the disease among men exceeds the incidence among women.
2 to 3 - The incidence of the disease among men exceeds the incidence among women.
3. The incidence of the disease among men exceeds that among women.

So the key thing here is that as you replace or omit words, think about what connections you may need to get the correct sentence. The nature of the two sentences is different. In the Official sentence, the main component - cost of running - took direct object without the need of any preposition. So when we replaced this with "that" we needed a connection - i.e. a preposition. However, in the other example, the main component - incidence of the disease - itself needed a preposition to connect to the object and hence when we replaced it with "that" we did not need to get another preposition.

Thus when you cross-check your work in ellipsis, start from the complete sentence and then work your way to simplified version with replacement words and omitted words.

Hope this helps.

Regards,

Payal

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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18 Mar 2013, 19:59
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You are absolutely correct in your understanding. And you are dead on about the ambiguity in the sentence if we omit "that among".

Now you asked about the following sentence - i.e. if we only omitted that and retained among.

The incidence of the disease among men exceeds among women.
IMO, this sentence is also ambiguous since it somehow may consider "incidence of that disease among men" as one entity and when this entity is put together with "among women", it would not make sense.

Let's take another example:
Attraction of child to chocolates exceeds to ice cream. - IMO incorrect
Attraction of child to chocolates exceeds that to ice cream. - Surely Correct.

I hope this helps.

Regards,
Payal
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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18 Mar 2013, 21:15
TO EGMAT

A says:While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

though i had eliminated A but i want to know if the initial comparison in A is faulty ?

if i say : nuclear power plants cost twice as much to run as other power plants . i know that this comparison is oki even without the helping verb "do" because there is no ambiguity

so i get a feeling that in A this initial comparison :While it costs about the same to run nuclear plants as other types of power plants seems to be right comparison wise .it might be wrong because of usage of "it" or because of some redundancy but comparison wise it seems oki .
any thought

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 06:05

Let me take a stab on it.

While it costs about the same to run nuclear plants as other types of power plants

Whenever, you encounter such questions, always make sure about the presence of Subject-Verb, Object and prepositional phrase.

If there is prepositional phrase, more often than not you have the ambiguity present. You will see that the sentence can be interpreted in two ways.

1) Repeat the MAIN VERB and see what does sentence mean now.
While it costs about the same to run nuclear plants as other types of power plants (Costs)

Sentence says that cost of running nuclear plants is same as the cost of other power plants(it may cost of infrastructure, or machinery or something else). Now this is illogical, because for sentence to be logical, you must compare costs of running nuclear plants with cost of running other plants

2) Repeat the preposition before second entity
While it costs about the same to run nuclear plants as {to run}other types of power plants
Now, here both the costs are same.

So, in nut shell, we have two different scenarios and hence, it is incorrect.

As far as your reasoning goes for negating choice A, I would refrain myself for using it until and unless I have other better choices.
For example,
it is absolutely correct to say that -

It is I who executes the automation scripts everyday.

Hope it is clear.

Thanks
H

TO EGMAT

A says:While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

though i had eliminated A but i want to know if the initial comparison in A is faulty ?

if i say : nuclear power plants cost twice as much as to run as other power plants . i know that this comparison is oki even without the helping verb "do" because there is no ambiguity

so i get a feeling that in A this initial comparison :While it costs about the same to run nuclear plants as other types of power plants seems to be right comparison wise .it might be wrong because of usage of "it" or because of some redundancy but comparison wise it seems oki .
any thought

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 06:10
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@himanshu if that is the case then why does this ambiguity does not arise in this comparison : nuclear power plants cost twice as much to run as other power plants

Quote:
As far as your reasoning goes for negating choice A, I would refrain myself for using it until and unless I have other better choices.

my reasoning of eliminating A was not the initial "it" but the later "it" that comes in the sentence .: nuclear plants that makes it more expensive

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 06:37
@himanshu if that is the case then why does this ambiguity does not arise in this comparison : nuclear power plants cost twice as much as to run as other power plants

As far as my analysis goes, I think above sentence is equally ambivalent.

Original Sentence
nuclear power plants cost twice as much as to run as other power plants -> as should not be there.- Wrong Idiom. I guess its typo.

Now, going by my framework -
nuclear power plants cost twice as much to run as other power plants

Repeat Preposition phrase
nuclear power plants cost twice as much to run as {to run }other power plants
Here, cost of running nuclear plants is being compared and
Cost of running nuclear power plants =2* cost of running others

Repeat Main verb
nuclear power plants cost twice as much to run as other power plants do(cost)
This is illogical -
Cost of running nuclear power plants is being compared to cost of other power plants.

I went back to my notes to check if as much as only compares only subjects -This is what I get

1) Comparing Subjects
We have three times as many pears as you(have) - Here it is logical that number of pears =3* as you have. It is illogical to say that number of pears is 3 times as you.
2) Comparing Objects
His knowledge springs as much from experience as from schooling.

Hope that makes sense.

Thanks
H
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 08:01
Quote:
nuclear power plants cost twice as much to run as other power plants

well this sentence is oki comparison wise

Pardon my knowledge. Request you to please show me your point of view, how the above sentence has a valid comparison. It could be structurally correct but as per me, its logically incorrect

Quote:
We have three times as many pears as you
the reason this sentence is ambiguous is coz "we" ,"pears" and "you" are parallel element and can make different meanings possible (which i guess u might be knowing )

This is perfectly correct sentence. Refer MGMAT, p 144.
I'm afraid if that is your reasoning of making the sentence ambiguous. For clarification, refer e-gmat article on ellipsis, example-

John cooks food better than his wife. - Its perfectly valid . However as per your explanation, its going to be ambiguous.

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 08:08
We have three times as many pears as you
well i treated "you" as a group coz "we" can refer to a group .so fine "you" in this sentence is referring to just one person then "pears" cannot be parallel element to "you"

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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 08:12
all i am intending is that such an ambiguity is not there in my that sentence :nuclear power plants cost twice as much to run as other power plants

Had that been the case, the following example would have been correct by your standards-

Authoritative parents are more likely to have children than permissive parents.

Again - apply framework
Meaning 1
Authoritative parents are more likely to have children than {to have}permissive parents.
Meaning -2
Authoritative parents are more likely to have children than permissive parents{are}

Either you or I going to have a concept clarified, with so much of discussion.
Waiting for experts.

Thanks
H
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Re: While it costs about the same to run nuclear plants as other [#permalink]

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19 Mar 2013, 11:10
egmat wrote:
imhimanshu wrote:
I tried to understand this concept by taking clues from MGMAT, but failed to do so. I would appreciate if someone can help me out.

Here is an example from MGMAT-
The incidence of the disease among men exceeds the incidence among women.
The incidence of the disease among men exceeds that among women.
Here, that is referring to incidence, per explanantion from MGMAT.

So, ellipsis should be -
The incidence of the disease among men exceeds that(of the disease) among women.
Now, going by same concept -

The cost of running nuclear plants is same as that for electric plants.
In the below sentence, what THAT is referring to . Is it "the cost" or "the cost of running".

If it is later, then why do we require an extra preposition?

The cost of running nuclear plants is same as {the cost of running }for electric plants.

Thanks
H

Very interesting question Himanshu.
When you are dealing with ellipsis, it always helps to begin from the completely expanded version with all the words and then move your way to the abbreviated version by applying ellipsis along the way. I will do the same here:

Let's consider only the pertinent portion of the sentence.

1. The cost of running nuclear plants is about the same as the cost of running other types of power plants.
No issues here with the comparison. Both sides of the comparison are grammatically and logically parallel.

Now what if I replace "the cost of running" with "that". After it is obvious that we are comparing cost of running of the two categories of plants. But when I apply this ellipsis, I need something to connect "that" with "other types of power plants".

2. (Without connection with that)
The cost of running nuclear plants is about the same as that other types of power plants. WRONG

2. (with correct connection)
The cost of running nuclear plants is about the same as that for other types of power plants.
So this is where the preposition "for" comes from.

Now we continue with our ellipsis. We can indeed even omit "that" from here since this omission will not lead to any ambiguity.

3. The cost of running nuclear plants is about the same as for other types of power plants.

So this is how I get to the correct sentence containing "for".

Now let's apply the same on the set of sentences:
1. The incidence of the disease among men exceeds the incidence of the disease among women.
1 to 2 - The incidence of the disease among men exceeds the incidence of the disease among women.
2. The incidence of the disease among men exceeds the incidence among women.
2 to 3 - The incidence of the disease among men exceeds the incidence among women.
3. The incidence of the disease among men exceeds that among women.

So the key thing here is that as you replace or omit words, think about what connections you may need to get the correct sentence. The nature of the two sentences is different. In the Official sentence, the main component - cost of running - took direct object without the need of any preposition. So when we replaced this with "that" we needed a connection - i.e. a preposition. However, in the other example, the main component - incidence of the disease - itself needed a preposition to connect to the object and hence when we replaced it with "that" we did not need to get another preposition.

Thus when you cross-check your work in ellipsis, start from the complete sentence and then work your way to simplified version with replacement words and omitted words.

Hope this helps.

Regards,

Payal

So OA is B IMO..

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Re: While it costs about the same to run nuclear plants as other   [#permalink] 19 Mar 2013, 11:10

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