According to surveys by the National Institute on Drug : GMAT Sentence Correction (SC)
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# According to surveys by the National Institute on Drug

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Manager
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According to surveys by the National Institute on Drug [#permalink]

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30 Mar 2006, 04:20
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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

can someone explain
If you have any questions
New!
Director
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30 Mar 2006, 06:02
(E) twice the number reported in the 1977 survey

In all others, "those" usage is incorrect as it refers to doubling a number or percentage (singular)
Director
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30 Mar 2006, 11:29
^ E ^

the number of the people is doubled so we should have "the number" in the correct answer. In A, C and D "those" is used. It sounds like doubling the people and it is not correct!

B says "to double.." there is not an aim here.

So E is best IMO.
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30 Mar 2006, 16:47
OA is E
VP
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31 Mar 2006, 04:05
OA is E
Manager
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04 Apr 2006, 03:34
so when the sentence refers to a number like 20 percent, is it always correct to say "double" rather than the idiom "twice as much as"?
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04 Apr 2006, 04:06
I think you cannot form a rule like that.
Here D is wrong because the option cantains "those" which is wrong.
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04 Apr 2006, 14:29
here I think "much" shouldnt be used 'cos we are trying to compare the %of people...E should be it
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05 Apr 2006, 14:33
How can it be E? The sentence mentions percentage, and E references the number of?
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05 Apr 2006, 18:21
I was sliding towards D but now as E is OA... I think I was wrong

20 % of...........,twice the number reported....

seems logical..
05 Apr 2006, 18:21
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