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标题: [求助]GWD22上一道数学题 [打印本页]

作者: hedgeforfu 时间: 2010-2-8 08:46 标题: [求助]GWD22上一道数学题

Q35:

There are 8 magazines lying on a table; 4 are fashion magazines and the other 4 are sports magazines.

If 3 magazines are to be selected at random from the 8 magazines, what is the probability that at least

one of the fashion magazines will be selected?

A. 1/2

B. 2/3

C. 32/35

D. 11/12

E. 13/14

这道题算了很久还是得不出答案E，请各位高手帮帮忙

作者: cattery 时间: 2010-2-8 22:26

这题 (C(8,3)-C(4,3))/C(8,3)=(56-4)/56=13/14

作者: hedgeforfu 时间: 2010-2-9 08:24

谢谢

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