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Combinations GMAT Prep PS

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Manager
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Combinations GMAT Prep PS [#permalink] New post 19 Mar 2009, 11:15
00:00
A
B
C
D
E

Difficulty:

(N/A)

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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
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A committee of three people is to be chosen from four married couples. What is the number of different committees that can be chosen if two people who are married to each other cannot both serve on the committee:

A. 16
B. 24
C. 26
D. 30
E. 32
Senior Manager
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Re: Combinations GMAT Prep PS [#permalink] New post 19 Mar 2009, 20:11
Ans

4C3 - Select the 3 couple out of four couples

2C1 - Select one out of each pair.

therefore number of commitees = 4C3 * (2C1)^3 = 32.
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Re: Combinations GMAT Prep PS [#permalink] New post 20 Mar 2009, 09:52
Many thanks. OA is indeed E.
Re: Combinations GMAT Prep PS   [#permalink] 20 Mar 2009, 09:52
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Combinations GMAT Prep PS

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