发表于 2010/7/22 9:58:02
楼主
标题:OG官方的一道题,看看你能不能选正确
Of 5 employees, 3 are to be assigned an office and 2 are to be assigned a cubicle. If 3 of the employees are men and 2 are women, and if those assigned an office are to be chosen at random, what is the probability that the offices will be assigned to 2 of the men and 1 of the women?) a2 D% L) u& t$ l0 L2 p% l

A 1/3    B 2/5   C 1/2   D 3/5    E 2/36 U+ v, p! g/ j
广告或者签名替代文字