The study....

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AIM GMAT: Legendary Member; Posts: 857; Joined: Wed Aug 25, 2010 1:36 amFollowed by: 15 members; Thanked: 56 times

by AIM GMAT » Mon Mar 21, 2011 12:09 am

The study, called the National Lung Screening Trial, focused on a specific high"risk
group: 53,000 current and former heavy smokers, aging from 55 to 74, which had
smoked for at least 30 pack"years

A. group: 53,000 current and former heavy smokers, aging from 55 to 74, which
had smoked for at least 30 pack"years

B. group: 53,000 current and former heavy smokers, aged 55 to 74, that had
smoked for at least 30 pack"years

C. group: 53,000 current and former heavy smokers, aged 55 to 74, who
smoked for at least 30 pack"years

D. group: 53,000 current and former heavy smokers, aged 55 to 74, who
had smoked for at least 30 pack"years

E. group: 53,000 current and former heavy smokers, who were aged 55 to
74,and who had smoked for higher than at least 30 pack"years

I will ask my actual doubt after some repies . Give it a try .

Thanks & Regards,
AIM GMAT

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Source: Beat The GMAT — Sentence Correction | Mon Mar 21, 2011 12:09 am

bubbliiiiiiii: Legendary Member; Posts: 979; Joined: Tue Apr 14, 2009 1:38 amFollowed by: 12 members; Location: Hyderabad, India; Thanked: 49 times; GMAT Score:700

by bubbliiiiiiii » Mon Mar 21, 2011 12:26 am

IMO C. Was tempted with E but chose C.

AIM GMAT wrote:The study, called the National Lung Screening Trial, focused on a specific high"risk
group: 53,000 current and former heavy smokers, aging from 55 to 74, which had
smoked for at least 30 pack"years

A. group: 53,000 current and former heavy smokers, aging from 55 to 74, whichhad smoked for at least 30 pack"years

B. group: 53,000 current and former heavy smokers, aged 55 to 74, that had
smoked for at least 30 pack"years

C. group: 53,000 current and former heavy smokers, aged 55 to 74, who
smoked for at least 30 pack"years

D. group: 53,000 current and former heavy smokers, aged 55 to 74, who
had smoked for at least 30 pack"years

E. group: 53,000 current and former heavy smokers, who were aged 55 to
74,and who had smoked for higher than at least 30 pack"years

I will ask my actual doubt after some repies . Give it a try .

Last edited by bubbliiiiiiii on Mon Mar 21, 2011 1:37 am, edited 1 time in total.

Regards,

Pranay

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HSPA: Legendary Member; Posts: 1101; Joined: Fri Jan 28, 2011 7:26 amFollowed by: 13 members; Thanked: 47 times; GMAT Score:640

by HSPA » Mon Mar 21, 2011 12:48 am

Reject A, B : we need who as we are talking about persons ( B is a close contender : if it is a group)

We need had : past perfect (who had been smoking for atleast 30 years)

we are left with D and E

we need men who "are" aged 55 to 74 at present.. people with 55 cannot have 30years exp 30 years back

SO POE : D, B

Please explain use of colon in a given sentence AIM..

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tetura84: Master | Next Rank: 500 Posts; Posts: 165; Joined: Wed Jan 26, 2011 7:33 pmFollowed by: 1 member; Location: Pune, India; Thanked: 16 times

by tetura84 » Mon Mar 21, 2011 3:26 am

A & B out because pronoun which/that is for non-human beings.
For human being, use who.

I rejected E for 2 reasons,
1. wordy
2. higher than at least 30 pack-Â�years = this is redundant

C is wrong, because past perfect tense is required. Here we are relating two past events, if we use simple past tenses, we cannot relate these events.

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AIM GMAT: Legendary Member; Posts: 857; Joined: Wed Aug 25, 2010 1:36 amFollowed by: 15 members; Thanked: 56 times

by AIM GMAT » Mon Mar 21, 2011 3:34 am

OA is D

I was really not sure why we need past perfect here i cannot relate with two activities going on diff span of time .

Thanks & Regards,
AIM GMAT

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GMATGuruNY: GMAT Instructor; Posts: 15539; Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members; Location: New York, NY; Thanked: 13060 times; GMAT Score:790

by GMATGuruNY » Mon Mar 21, 2011 4:04 am

AIM GMAT wrote:OA is D

I was really not sure why we need past perfect here i cannot relate with two activities going on diff span of time .

The people in the study were former smokers: thus, they had smoked prior to the study. The past perfect makes it clear that the people were no longer smoking when the study focused on them.

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AIM GMAT: Legendary Member; Posts: 857; Joined: Wed Aug 25, 2010 1:36 amFollowed by: 15 members; Thanked: 56 times

by AIM GMAT » Mon Mar 21, 2011 4:09 am

Thanks Mitch , now the sceanario is clear , happened to faultly assume that the smokers are still heavy smokers . Silly me

Thanks & Regards,
AIM GMAT

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tetura84: Master | Next Rank: 500 Posts; Posts: 165; Joined: Wed Jan 26, 2011 7:33 pmFollowed by: 1 member; Location: Pune, India; Thanked: 16 times

by tetura84 » Mon Mar 21, 2011 5:58 am

Mitch, the people in the study were former smokers as well as current smokers.

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GMATGuruNY: GMAT Instructor; Posts: 15539; Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members; Location: New York, NY; Thanked: 13060 times; GMAT Score:790

by GMATGuruNY » Mon Mar 21, 2011 6:22 am

tetura84 wrote:Mitch, the people in the study were former smokers as well as current smokers.

Point taken. But the adjective former helps to make clear that the smoking had taken place before the study, so the past perfect is needed.

By the way, what is the source of this question? The OA seems to be a direct quote from the New York Times:

https://well.blogs.nytimes.com/2010/11/1 ... -ct-scans/

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AIM GMAT: Legendary Member; Posts: 857; Joined: Wed Aug 25, 2010 1:36 amFollowed by: 15 members; Thanked: 56 times

by AIM GMAT » Mon Mar 21, 2011 6:26 am

Thanks Mitch and tetura .

The source is SC Grail .

Thanks & Regards,
AIM GMAT

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tetura84: Master | Next Rank: 500 Posts; Posts: 165; Joined: Wed Jan 26, 2011 7:33 pmFollowed by: 1 member; Location: Pune, India; Thanked: 16 times

by tetura84 » Mon Mar 21, 2011 7:30 am

Thanks Mitch, that's what I also thought.

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Target2009: Legendary Member; Posts: 574; Joined: Sat Oct 31, 2009 1:47 pmFollowed by: 5 members; Location: USA; Thanked: 29 times

by Target2009 » Mon Mar 21, 2011 9:14 pm

+1 D

Regards
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