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bunnymiss · 2020年01月25日

问一道题:NO.PZ2020010301000005 [ FRM I ]

问题如下图:

          

h、i不懂

1 个答案

orange品职答疑助手 · 2020年02月04日

h:A的补集并上D的补集,相当于既不在A中也不在D中的交集,所以是15%+7%+6%+15%(其中15%是要自己算的,它等于不在abcd内的概率,要自己根据1-图中所有概率 来自己算出)

i:问这四个事件中,任选两个事件,这一对事件会不会是独立事件。只有A事件与B事件 组成的这一对事件满足。因为P(A)*P(B)=P(AB)

比如世界 · 2020年03月30日

其中15%是要自己算的,它等于不在abcd内的概率,要自己根据1-图中所有概率 来自己算出,这个是什么意思啊?不在abcd内的概率是啥,不存在吗?老师麻烦再讲一下,谢谢

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