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# The number of people flying first class on domestic flights

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Director
Joined: 12 Oct 2008
Posts: 506
The number of people flying first class on domestic flights [#permalink]

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29 Jul 2009, 21:11
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The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of
B. doubling that of the increase in
C. double as much as the increase of
D. twice as many as the increase in
E. twice as many as the increase of

Could someone explain when to use doubling and when to use twice

[Reveal] Spoiler:
A, but what is wrong with D

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Manager
Joined: 19 Jun 2009
Posts: 141
Location: India
Concentration: Strategy, General Management
GMAT 1: 650 Q51 V27
GMAT 2: 710 Q48 V39
GPA: 3.2
WE: Engineering (Computer Hardware)
Re: One more SC...number of people [#permalink]

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29 Jul 2009, 22:07
The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of
B. doubling that of the increase in
C. double as much as the increase of
D. twice as many as the increase in
E. twice as many as the increase of

Could someone explain when to use doubling and when to use twice

[Reveal] Spoiler:
A, but what is wrong with D

Can you please mention where do you get this problem from ?

Anyway, this is what I think -

D - 'twice' is more appropriate when you have mentioned a specific number. Here the sentence compares the 'increment' of two years, hence 'doubling' is the right word.

Also, 'increase of' is preferred rather than 'increased in'.
_________________

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Retired Moderator
Status: The last round
Joined: 18 Jun 2009
Posts: 1266
Concentration: Strategy, General Management
GMAT 1: 680 Q48 V34
Re: One more SC...number of people [#permalink]

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29 Jul 2009, 22:19
The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of
B. doubling that of the increase in
C. double as much as the increase of
D. twice as many as the increase in
E. twice as many as the increase of

Could someone explain when to use doubling and when to use twice

[Reveal] Spoiler:
A, but what is wrong with D

"twice as many as" refers to people, so people can't be compare with "increase". people can only be compared with people, increase in one year can be compared with increase in another!!
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Manager
Joined: 18 Jun 2009
Posts: 165
Location: Tbilisi, Georgia
Re: One more SC...number of people [#permalink]

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30 Jul 2009, 00:52
The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of
B. doubling that of the increase in
C. double as much as the increase of
D. twice as many as the increase in
E. twice as many as the increase of

I understand the sentence in the following way: the number of people risen sharply in 1990 doubled the increase of the previous year. we are comparing "increase", so 'doubling' seems more appropriate
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Manager
Joined: 29 Jul 2009
Posts: 110
Re: One more SC...number of people [#permalink]

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31 Jul 2009, 08:45
The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of
B. doubling that of the increase in
C. double as much as the increase of
D. twice as many as the increase in
E. twice as many as the increase of

Could someone explain when to use doubling and when to use twice

[Reveal] Spoiler:
A, but what is wrong with D

I FOUND THIS EXPLANATION ON MANHATTAN FORUMS POSTED BY ONE OF THE TUTORS-RON

HTH

in this case, you can't use "..., twice as many as...", because that's an appositive modifier. appositives must modify some noun that comes IMMEDIATELY before the comma, which in this case would have to be whatever figure is twice whatever other figure. since no such figure is given, you can't use this construction.

so, A, B or C

by contrast, the -ING FOLLOWED BY A COMMA modifies the entire action of the preceding clause. this is exactly what you want to happen, because the actual rising of the # of people flying first class is what "doubled the increase of...". there's no noun in there that pinpoints this concept, so you have to use a modifier that modifies the entire clause.
Manager
Joined: 14 Apr 2008
Posts: 50
Re: One more SC...number of people [#permalink]

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01 Aug 2009, 07:28
in a is effect of the action ing form ... which is need not to be used
Director
Joined: 12 Oct 2008
Posts: 506
Re: One more SC...number of people [#permalink]

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01 Aug 2009, 07:51

alpeshvc wrote:
The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

A. doubling the increase of
B. doubling that of the increase in
C. double as much as the increase of
D. twice as many as the increase in
E. twice as many as the increase of

Could someone explain when to use doubling and when to use twice

[Reveal] Spoiler:
A, but what is wrong with D

Can you please mention where do you get this problem from ?

Anyway, this is what I think -

D - 'twice' is more appropriate when you have mentioned a specific number. Here the sentence compares the 'increment' of two years, hence 'doubling' is the right word.

Also, 'increase of' is preferred rather than 'increased in'.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: One more SC...number of people   [#permalink] 01 Aug 2009, 07:51
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