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Several industries have recently switched at least partly from older t

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 17 Dec 2015, 14:58
Could anybody say why answer choice A is incorrect?
Thanks in advance

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 18 Dec 2015, 06:40
lipsi18 wrote:
Could anybody say why answer choice A is incorrect?
Thanks in advance


Several industries have recently switched at least partly from older technologies to new technology.
It is thus evident that less fossil fuel is being used as a result of the operations of these induestries than would have been used if these industries had retained their older technologies.

Say,

Let initial amount of fossil fuel used be 100
after they partly shifted say no we use 50 of fossil fuel and 50 of electricity.

this is a strengthen question so we need a similar info to support the argument. Choice A says that
Quote:
A) Many of the industries that have switched to at least partly to new technologies have increased their output.


If the output is increased, then to say 150
the this output may be out of 75e+75f(fossil usage increased) or 100e+50f(fossil usage decreased).
So this option neither strengthens nor weakens the conclusion properly.

I hope this helps.
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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 10 May 2016, 18:25
for E. --> I don't think that the plant would have to generate the electricity itself (can be bought from the electricity plant), so I think it's out of topic to mention about how electricity was produced
then I choose C.

what's wrong with my logic?

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 14 Jul 2016, 11:18
The correct answer is E

Old technology uses more fossil fuel
New technology powered by electricity

Conclusion New technology use less fossil fuel

Can you see the gap :-Old technology use fossil fuel, New technology uses Electricity and suddenly the conclusion is made that new technology uses less fossil fuel.
SO the missing link is that somehow fossil fuel should figure in relation to new technology.

For example see this argument
Bob can solve 12 questions in one minute
John can eat 15 donuts in one minute
Therefore John is more talented than Bob

Does this comparison makes sense.. "NO" ==> Eating donuts and solving questions are two different talents and thus cannot be compared. So to strengthen the conclusion that John (donut eating kid) is more talented, we have to show something John can solve questions also. Then only a logical comparison between Him and bob will be established. So in this the correct strengthen will be :- When Bob solve questions while eating donuts , his error rate is 58 %, whereas John can eat donuts and solve same number of question with only 10 percent error rate.

SO applying this same principle in the given question we can see that somehow we need to correlate Old technology, New Technology, electricity and fossil fuels to make sense of the relationship between them.

Only option E does it perfectly
E) The amount of fossil fuel used to generate the electricty needed to power the new technologies is less than amount that would have been uesed to power the older technologies --> Yup. correct tells that what is the relation ship between fossil fuel and technology and electricity ; thus now the comparison of old and new technology is valid and the conclusion is intactly supported



tracyyahoo wrote:
67. Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technology powered by electricity. It is thus evident that less fossil fuel is being used as a result of the operations of these induestries than would have been used if these industries had retained their older technologies.

Which of the following, if true, most strengthen the argument above?

A) Many of the industries that have switched to at least partly to new technologies have increased their output.
B) Less fossil fuel was used to manufacture the machinery employed in the new technologies than was orginally used to manufacture the machinery employed in the older technologies.
C) More electricity is used to by those industries that have switched at least partly to the new technologies than by those industries that have not switched.
D) Some of the industries that have switched at least partly to the new technologies still use primarily technologies that are powered by fossil fuel.
E) The amount of fossil fuel used to generate the electricty needed to power the new technologies is less than amount that would have been uesed to power the older technologies.

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 15 Jul 2016, 00:17
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B is just re statement of the last line of the argument.

If you can find better strengthner than B , then that choice is the answer.

E strenthens more than B

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 26 Jul 2016, 20:57
Here we just need to focus on the relationship of electricity, fossil fuel.
(B) should we compare the fuel to produce machinery here? If we change to new technology, we need to produce new machinery, but if we use the old technology, do we need to produce the same amount of machinery or we can use the old one? This comparison is unclear.
--> choose E

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 15 Dec 2017, 23:40
mikemcgarry sayantanc2k

As per the premise it is mentioned that the usage of FF will be minimised or the usage will decline,
I was stuck between B and E and in the end chose the wrong option B, however, Can we eliminate option B on the basis of the word :Manufacturing: as the premise is talking about the usage of the FF and not about the where the FF was used to manufacture?

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Re: Several industries have recently switched at least partly from older t [#permalink]

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New post 16 Dec 2017, 15:19
siddyj94 wrote:
mikemcgarry sayantanc2k

As per the premise it is mentioned that the usage of FF will be minimised or the usage will decline,
I was stuck between B and E and in the end chose the wrong option B, however, Can we eliminate option B on the basis of the word :Manufacturing: as the premise is talking about the usage of the FF and not about the where the FF was used to manufacture?

Dear siddyj94,

I'm happy to respond. :-)

My friend, the logic needed on the GMAT CR is the logic of the real business world. You cannot think about GMAT CR arguments in a vacuum. You have to think about the way money changes hands every day in the business world. See this blog post:
GMAT Critical Reasoning and Outside Knowledge

(B) concerns a one-time expense. The "machinery employed in the new technologies" is manufactured once, and then no more energy is expended on that process. The machines are ready to use.

(E) concerns an ongoing process---every single day, the factories will be drawing more electricity to run their machines. If this electricity comes from fossil fuels, then every day, new quantities of fossil fuels will be burned. That's an every day continuing drain on resources, as opposed to a one-time tapping of resources.

Does all this make sense?
Mike :-)
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Re: Several industries have recently switched at least partly from older t   [#permalink] 16 Dec 2017, 15:19

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