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标题: [求助]最新试题1，mathe/Q2,怎么做？ [打印本页]

作者: lemonees 时间: 2005-6-29 06:33 标题: [求助]最新试题1，mathe/Q2,怎么做？

Q2:

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 > ATH connecttype="rect" gradientshapeok="t" extrusionok="f">ATH>?

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

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

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B.Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

我觉得B,但是答案是E.请问各位大牛，怎么算？

作者: sammen 时间: 2005-6-29 17:40

根据条件2可以算出男的人数是0<=男的<=3那么当女的是7个的时候，P＝7/15<0.5，按这个思路就可以算出答案了，不过楼主没给全题目。

作者: sammen 时间: 2005-6-29 17:56

少说了一点，根据条件2得出女的人数是大于等于7的。等于7的时候是小于0.5，等于8的时候是大于0.5，所以不确定。

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