QX:

If the probability is 0.54 that Stock A will increase in value during the next month and the probability is 0.68 that Stock B will increase in value during the next month, what is the greatest possible value for the probability that neither of these two events will occur?

A.       0.22

B.       0.32

C.      0.37

D.      0.46

E.       0.63

Answer:

这个题困惑以久, 请高手帮助.....谢谢~~~~~~~~~

我记得高中做这种概率题做的很多，其特点是问不发生的时候，就要先求两者都发生的概率，再用1减去

签名计算得出的值

在这道题中就是1－（0。54×0。68）＝0。63

不知道这样解释可否呢？

一起加油噢！！^^