求教GWD-1-2, 谢谢了!!!

xiongxiong88

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!!!

smart

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)

xiongxiong88

thanks !!!