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Gmat Prep?? (Probability)

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by dferm » Sun Sep 21, 2008 10:42 am
Of the 12 temporary employees in a certain company, 4 will be hired as permanent employees. If 5 of the 12 temporary employees are women, how many of the possible groups of 4 temporary employees consist of 3 woman and 1 man?

A. 22
B. 35
C. 56
D. 70
E. 105

Please Help....

Thanks...
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by cramya » Sun Sep 21, 2008 11:04 am
Is it 70?

5C3.7C1 out of a total of 12C4
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by mals24 » Sun Sep 21, 2008 11:05 am
IMO D

Total number of women - 5
Total number of men - 12-5 = 7

Hence the total number of combination of 3 women and 1 man = 5C3*7C1 = 10*7 = 70
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by dferm » Sun Sep 21, 2008 11:10 am
Correct....
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by cramya » Sun Sep 21, 2008 11:14 am
4 will be hired as permamnent employees is the extra fluff thats not neededed and may throw off some calculations :lol:
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