doubling vs twice

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garima99: Master | Next Rank: 500 Posts; Posts: 217; Joined: Tue May 31, 2011 9:42 pmFollowed by: 2 members; Thanked: 8 times

by garima99 » Sat Oct 15, 2011 9:02 am

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Source: Beat The GMAT — Sentence Correction | Sat Oct 15, 2011 9:02 am

parul9: Master | Next Rank: 500 Posts; Posts: 197; Joined: Thu Sep 15, 2011 10:22 amFollowed by: 2 members; Thanked: 6 times

by parul9 » Sat Oct 15, 2011 9:12 am

The best answer from the choices given is A.
"twice as many as the increase in/of" is incorrect construction.

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avik.ch: Legendary Member; Posts: 641; Joined: Wed Apr 20, 2011 1:15 amFollowed by: 32 members; Thanked: 149 times; GMAT Score:760

by avik.ch » Sat Oct 15, 2011 9:20 am

Here doubling is modifying the entire clause : The number of people flying first class on domestic .........

As far as "twice" usage is concerned, please refer manhattan SC.

A example from MGMAT SC,

The concert was attended by 300 people, twice the previous attendence. - "twice ........" modifies 300 people.
2 X previous attendance = 300 people
usage of twice after "comma" similar to D and E

I hope this helps

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Pratishtha21: Senior | Next Rank: 100 Posts; Posts: 32; Joined: Sat Jul 01, 2017 5:55 am

by Pratishtha21 » Sat Jul 15, 2017 11:42 am

Here 2 things need to be remembered.
1. Twice is an adverb and can't be used with 'by'.
2. Double can act as a noun, a verb, an adjective..

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