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# To develop more accurate population forecasts, demographers

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Re: To develop more accurate population forecasts, demographers [#permalink]

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17 Apr 2012, 12:58
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

have to know a great deal more than now is incorrect
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Re: To develop more accurate population forecasts, demographers [#permalink]

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18 Apr 2012, 07:17
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

social and economic detriments.. hence answer options are split A D and B C E.. B C E are rejected.

within A and D

A: more than now... they seem to be comparing with TIME instead of knowledge..hence INCORRECT
D: Correctly compares with knowledge.. CORRECT
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Re: To develop more accurate population forecasts, demographers [#permalink]

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29 May 2012, 06:56
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

This is about an expecation ..IF I HAVE TO DO SOMETHNG, THEN I WOULD HAVE TO KNOW SOMETHING..its just plain guess though...if someone case help me understand this...

the first split is AB & CDE..choosing CDE

in CDE economical factors are not correct, its economic detriments... hence D
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Re: To develop more accurate population forecasts, demographers [#permalink]

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29 May 2012, 17:45
what if the sentence has an "if " in the beginning?

Posted from my mobile device
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Re: To develop more accurate population forecasts, demographers [#permalink]

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13 Jun 2012, 01:31
good solution.. thanks for posting the question as well
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Re: To develop more accurate population forecasts, demographers [#permalink]

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30 Jun 2012, 06:01
D for me too. However, is 'they' justified for demographers alone, and not for forecasts?
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Re: To develop more accurate population forecasts, demographers [#permalink]

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30 Jun 2012, 06:53
+1 for (D)

(C) & (D) has the tie but (D) wins because "economic" refers to the "determinants of fertility" whereas "economical" is used in monetary context.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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10 Feb 2013, 03:13
MGMAT says 'would' is used to express the future from the past's point of view.

Ex- The scientist believes that the machine would be wonderful

The above example is wrong as 'believes' is in present. If believes is replaced by 'believed' the ex becomes correct.

Now can someone explain why would is used here as the tense used in the question is simple present/present perfect.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 04:34
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

"they" in D is correct because it parallel with "demographers" . This situation of pronoun ambiguity is acceptable according to gmat standard.

D is pattern of parallelism between main clause and subordinate clause. This kind of paralellism is tested brutally in the question " paris is her home before it it fastionable to be..." which you can search on the internet.

the concept tested here is that kind of parallelism.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 08:44
Vercules wrote:
rajathpanta wrote:
MGMAT says 'would' is used to express the future from the past's point of view.

Ex- The scientist believes that the machine would be wonderful

The above example is wrong as 'believes' is in present. If believes is replaced by 'believed' the ex becomes correct.

Now can someone explain why would is used here as the tense used in the question is simple present/present perfect.

Hi rajathpanta,

The scientist believes that the machine would be wonderful --> is incorrect because here we are mixing present with conditional.

Why is this so? because it is a rule. For conditionals there a few rules and you have to just remember them, there is not much to understand here. The rules on Conditionals are governed by set rules. MGMAT has explained the rules quite well, just make a note of them.

Consider this sentence: The scientist said that the machine would be wonderful. --> here "would" is expressing past as it is being used in the reported speech. The sentence is correct as per another rule on the usage of would.

The scientist believed that the machine would be wonderful - Correct usage, "would" expresses future from the past point of view.

Hope that helps,

Vercules

Hi Vercules,

Thanks. Can you explain how this rule is applicable to the question discussed here.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 08:48
Hi rajathpanta,

Which question you are referring to. The main question of the post or your specific question. If it is your specific question, the please let me know which one.

Vercules
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 08:52
Vercules wrote:
Hi rajathpanta,

Which question you are referring to. The main question of the post or your specific question. If it is your specific question, the please let me know which one.

Vercules

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Here, why is would used?? I wanted to understand that as per your explanation given.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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29 May 2013, 04:18
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

Went wrong by choosing economical over economic....D sounds better than C.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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31 May 2013, 18:05
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

Just want to share my thoughts here:
i think the construction would and would have will go here. The only difference is between economic and economical. This eliminates B,C and E. In A the comparison is incorrect. D Wins.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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02 Oct 2013, 11:57
1) To get 700 in gmat , I have to score 48 in quant and 38 in verbal section .
2) To get 700 in gmat , I would have to score 48 in quant and 38 in verbal section .

Is the # 1 incorrect because of same reasons as in this OG problem ?
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Re: To develop more accurate population forecasts, demographers [#permalink]

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04 Aug 2014, 04:15
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

this is old question. both A and E is correct. there is no ambiguity in choice A. we will never have to choose betwen A and D on the test
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Re: To develop more accurate population forecasts, demographers [#permalink]

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06 Mar 2015, 01:43
I think we use 'would' here because we think about the sentence structure : if they were to develop ....
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Re: To develop more accurate population forecasts, demographers [#permalink]

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27 Mar 2015, 11:37
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

One must note a use of 'would' to show uncertainty.

Secondly, one must also note a difference between economic vs. economical.

economic is the subject economics.

economical is cheap/ low price

Hence, option D is a right choice with correct usage of would and economic.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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26 Aug 2015, 05:51
Economic v/s economical

Economic is the correct option in this case.

that eliminates A,B,C

Between D and E, Answer is D
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Re: To develop more accurate population forecasts, demographers [#permalink]

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28 Aug 2015, 20:37
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.

(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical

Question 32 Set 1

help

if A contain "in the future" so that it parallel to "now" then, A will be correct

if we can use "now" in the second part of comparison but have no corresponding part in the first part such as "in the future" the sentence is not parallel.

we add"they do" to make sentence paralel.

A means

they have to know more than they have to know now.
future time is needed in the first part of sentence
Re: To develop more accurate population forecasts, demographers   [#permalink] 28 Aug 2015, 20:37

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