Double or twice concept tested

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gmat620: Senior | Next Rank: 100 Posts; Posts: 95; Joined: Thu Mar 12, 2009 2:39 am; GMAT Score:620

by gmat620 » Mon Mar 16, 2009 2:44 pm

I marked the correct answer but still not sure how to apply POE on this one....plz explain....I would really appreciate your help...thanks !!

According to surveys by the National Institute on Drug Abuse, about 20 percent of young adults used cocaine in 1979, doubling those reported in the 1977 survey.
(A) doubling those reported in the 1977 survey
(B) to double the number the 1977 survey reported
(C) twice those the 1977 survey reported
(D) twice as much as those reported in the 1977 survey
(E) twice the number reported in the 1977 survey

OA after some explanations

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Source: Beat The GMAT — Sentence Correction | Mon Mar 16, 2009 2:44 pm

krisraam: Master | Next Rank: 500 Posts; Posts: 221; Joined: Wed Jan 21, 2009 10:33 amFollowed by: 1 member; Thanked: 12 times

by krisraam » Mon Mar 16, 2009 5:11 pm

those is confusing here.

In place of "those" we should have some thing that modifies the number reported rather than the young adults.

E is the my answer.

Thanks
raama

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Nailya: Senior | Next Rank: 100 Posts; Posts: 91; Joined: Sat Feb 21, 2009 3:46 pm; Location: New York City; Thanked: 2 times

Re: Double or twice concept tested

by Nailya » Mon Mar 16, 2009 6:57 pm

Answer is E

(A) doubling those reported in the 1977 survey - sounds like doubling young adults instead of percentage
(B) to double the number the 1977 survey reported - awkward
(C) twice those the 1977 survey reported - those refers to young adults instead of numbers
(D) twice as much as those reported in the 1977 survey - twice as much means quantity of smth, much cannot refer to numbers
(E) twice the number reported in the 1977 survey - the best option

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gmat620: Senior | Next Rank: 100 Posts; Posts: 95; Joined: Thu Mar 12, 2009 2:39 am; GMAT Score:620

by gmat620 » Tue Mar 17, 2009 12:36 am

OA:E.....thank you everyone !!

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gmat740: MBA Student; Posts: 1194; Joined: Sat Aug 16, 2008 9:42 pmFollowed by: 17 members; Location: Paris, France; Thanked: 71 times; GMAT Score:710

by gmat740 » Tue Mar 17, 2009 12:47 am

(A) doubling those reported in the 1977 survey - sounds like doubling young adults instead of percentage

Good reason

(B) to double the number the 1977 survey reported - awkward

Although this is not awkward but yes this is a case of altered intent. here it means as if someone is responsible to double it.

D) twice as much as those reported in the 1977 survey - twice as much means quantity of smth, much cannot refer to numbers

Its wordy

Best tip for GMAT: whenever you are confused with two options,select the option which is less WORDY!!

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