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A certain club has 20 members. What is the ratio of the

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Manager
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A certain club has 20 members. What is the ratio of the [#permalink] New post 23 Jan 2008, 02:39
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C
D
E

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A certain club has 20 members. What is the ratio of the member of 5-member
committees that can be formed from the members of the club to the number of 4-member
committees that can be formed from the members of the club?

A. 16 to 1
B. 15 to 1
C. 16 to 5
D. 15 to 6
E. 5 to 4

Please Explain, OA will follow
Director
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Re: PS Set #22 [#permalink] New post 23 Jan 2008, 04:46
I think it is C,

16 to 5

I used combinations and the ratio would be ->

(20!/(5! X 15!)) / (20!/(4! X 16!)) => (16! X 4!)/(15! X 5!) =>16/5
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Director
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Re: PS Set #22 [#permalink] New post 23 Jan 2008, 04:50
Image : Image

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Image

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Answer C
Senior Manager
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Re: PS Set #22 [#permalink] New post 23 Jan 2008, 12:24
C too because of the same reasons.
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Re: PS Set #22 [#permalink] New post 25 Jan 2008, 10:40
Sorry for thh late reply. OA is C
tnx
Re: PS Set #22   [#permalink] 25 Jan 2008, 10:40
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