国际顶尖MBA申请交流平台--TOPWAY MBA

标题: 求教GWD-1-2, 谢谢了!!! [打印本页]

作者: xiongxiong88 时间: 2005-8-29 20:33 标题: 求教GWD-1-2, 谢谢了!!!

DS:

If 2 different representatives are to be selected at random from a group of 10 employees and if P is the probability that both representatives selected will be women, is P>1/2?

(1) More than 1/2 of the 10 employees are women.

(2) The probability that both representatives selected will be men is less than 1/10.

求助解题过程.谢谢了!!!

作者: smart 时间: 2005-8-30 00:43

1). it depends on how many female in the group. If the number of Women is 6, the answer is 6/10*5/9<0.5, if n=9, then the answer is >0.5.

Still don't get the reason for 2)

作者: xiongxiong88 时间: 2005-8-30 06:01

thanks !!!

欢迎光临国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)