GWD math18 Q32 求解谢谢！

怡然yiran · 发表于 2011-12-3 13:32:32

Q32:

What is the probability that event E or event F or both will occur?

(1)The probability that event E will occur is 0.6.

(2)The probability that event F will occur is 0.4.

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.

这道题如果用概率那么，1-(1-0.4)×(1-0.6)=0.74应该选C啊
难道是用要韦恩图?为什么呢？
谢谢！！！

12604698 · 发表于 2011-12-3 13:36:25

是不是没说e，f是相互独立事件？

ksshc · 发表于 2011-12-3 13:36:55

我觉得也是选c 不懂哇

ksshc · 发表于 2011-12-3 13:37:45

是不是没说e，f是相互独立事件？

-- by 会员 12604698 (2011/12/3 13:36:25)

啊对

怡然yiran · 发表于 2011-12-3 13:38:49

是不是没说e，f是相互独立事件？

-- by 会员 12604698 (2011/12/3 13:36:25)

真的哇？！好吧。。。太坑爹了。。。下次记住
谢谢啦！！！

GWD math18 Q32 求解谢谢！

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GWD math18 Q32 求解谢谢！