BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Forecast

This topic has expert replies
Post new topic Locked
Previous Topic Next Topic
Legendary Member
Posts: 1799
Joined: Wed Dec 24, 2008 3:03 am
Thanked: 36 times
Followed by:2 members

Forecast

by goelmohit2002 » Sat Aug 22, 2009 1:00 am
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants 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 economic

OA = D...can someone please tell what is wrong with A and E ?
Top
Source: — Sentence Correction |
User avatar
Master | Next Rank: 500 Posts
Posts: 393
Joined: Sun Jul 19, 2009 9:18 pm
Location: Chicago
Thanked: 8 times

Re: Forecast

by riteshbindal » Sat Aug 22, 2009 1:12 am
goelmohit2002 wrote:To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants 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 economic

OA = D...can someone please tell what is wrong with A and E ?
The answer should use "would". It is a condition actually. To develop.... Demographers "should"/"would have to" know blah blah blah.
So A and B are out.
One more reason to kick A out is the parallelism factor. "Demographers would have to know more than now". would have to know is being compared with "now". That is not correct.

Let's check C, D and E now.
C --> "economical" changes the meaning.
D --> Correct.
E --> Parallelism. would have to know is being compared with "now".

Please let me know if this explanation is helpful.


Thanks.
Top
Legendary Member
Posts: 1799
Joined: Wed Dec 24, 2008 3:03 am
Thanked: 36 times
Followed by:2 members

Re: Forecast

by goelmohit2002 » Sat Aug 22, 2009 1:19 am
riteshbindal wrote: The answer should use "would". It is a condition actually. To develop.... Demographers "should"/"would have to" know blah blah blah.
So A and B are out.
One more reason to kick A out is the parallelism factor. "Demographers would have to know more than now". would have to know is being compared with "now". That is not correct.

Let's check C, D and E now.
C --> "economical" changes the meaning.
D --> Correct.
E --> Parallelism. would have to know is being compared with "now".

Please let me know if this explanation is helpful.
Thanks.
Thanks Ritesh !!!

Can you please tell why would/should is required...is there a grammar rule for the same ?

Also can you please tell why comparison is wrong....there are couple of examples in OG where they kick out answer based on the reasoning that you too gave....but sometimes they accept the same...saying that comparison is implicit...I suppose that is known as elipse....can you please help me understand when dropping is fine and when it is not(as is the case in this question)?
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 393
Joined: Sun Jul 19, 2009 9:18 pm
Location: Chicago
Thanked: 8 times

Re: Forecast

by riteshbindal » Sat Aug 22, 2009 1:24 am
goelmohit2002 wrote:
riteshbindal wrote: The answer should use "would". It is a condition actually. To develop.... Demographers "should"/"would have to" know blah blah blah.
So A and B are out.
One more reason to kick A out is the parallelism factor. "Demographers would have to know more than now". would have to know is being compared with "now". That is not correct.

Let's check C, D and E now.
C --> "economical" changes the meaning.
D --> Correct.
E --> Parallelism. would have to know is being compared with "now".

Please let me know if this explanation is helpful.
Thanks.
Thanks Ritesh !!!

Can you please tell why would/should is required...is there a grammar rule for the same ?

Also can you please tell why comparison is wrong....there are couple of examples in OG where they kick out answer based on the reasoning that you too gave....but sometimes they accept the same...saying that comparison is implicit...I suppose that is known as elipse....can you please help me understand when dropping is fine and when it is not(as is the case in this question)?
Hi Mohit,
Not sure about grammar rule. But I am sure, you may find one in Manhatten SC that if we are talking about some thing which is not sure, we should use "would".
Even if you don't want to use it, A can also be removed due to parallelism as we did it in sme other choices too.
I am not sure about those answers in which OG is not kicking out the answers even if it does not have correct parallelism. May be, I can see some examples to check if there is any difference in those questions.
Top
Master | Next Rank: 500 Posts
Posts: 268
Joined: Sat Aug 15, 2009 9:22 am
Thanked: 19 times
Followed by:1 members
GMAT Score:700

by capnx » Sat Aug 22, 2009 10:42 am
it's not so much that "would" is necessary but that all other answers are wrong besides D

"economical" is wrong, so B C are out.
"than now" is wrong, so A E are out.
So only D is left behind.

Whether "would" is used, the meaning is changed slightly but that's not the deal breaker in this question.
Top
Legendary Member
Posts: 1799
Joined: Wed Dec 24, 2008 3:03 am
Thanked: 36 times
Followed by:2 members

by goelmohit2002 » Sat Aug 22, 2009 10:52 am
I think ritesh is bang on !!!

This is the case of hypothetical...so we need to use....would....

Other reasons too I think are good reasons to kick out options...
Top
Master | Next Rank: 500 Posts
Posts: 399
Joined: Wed Apr 15, 2009 3:48 am
Location: india
Thanked: 39 times

by xcusemeplz2009 » Sat Aug 22, 2009 11:19 am
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

the bolded part indicates that its a case of subjunctive mood , so it requires conditional verb would have and out of C D and E agree with ritesh

for more information check this link

https://gmat-grammar.blocked/2006/0 ... verbs.html
It does not matter how many times you get knocked down , but how many times you get up
Top
Master | Next Rank: 500 Posts
Posts: 197
Joined: Sun May 18, 2008 2:47 am
Thanked: 12 times

Re: Forecast

by shahdevine » Sat Aug 22, 2009 11:57 am
goelmohit2002 wrote:To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants 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 economic

OA = D...can someone please tell what is wrong with A and E ?
E does not work because "than" sets up a comparison that is unbalanced in this case. "now" is an adverb that's being compared to "know"ing, a verb. However D, sets up a comparison that is balanced, "know"ing and "do"ing.

you got this man!
Top
Post new topic Locked
• Page 1 of 1