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安安鱼 · 2020年01月17日

问一道题:NO.PZ2020010301000005 [ FRM I ]

问题如下图:

]g.h题目我都看不懂,上课老师好像没有讲这个\是什么意思

1 个答案

品职答疑小助手雍 · 2020年01月17日

同学你好,这个其实就是高一数学那个韦恩图,描述的这些概率可以算出来几个集合之间的交集并集差集等等,当然也可以表现事情发生的概率,还有某事件发生时另一个事件发生的条件概率。拿d小问举例,问的是A发生的情况下B发生的概率,那么,AB同时发生的概率是9%,A发生的概率是30%,那么d问的条件概率就是9%占30%的多少,答案就是9%/30%=30%。

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