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英文数学概率题
If three fair dice are thrown,and the sum is an odd number,what is the probability that all three
dice show an odd number?
人气:103 ℃ 时间:2020-05-25 00:38:47
解答
A:the sum is an odd number,B:all three dice show an odd number
p(A)=0.5,p(B)=0.5^3,p(A|B)=1
p(B|A)=p(A|B)*P(B)/P(A)=1/4能不能再详细点 没看懂p(B|A)=p(A|B)*P(B)/P(A)=1/4 这部分 还有p(A|B)=1是什么意思哦没学过条件概率吗学过 很久以前了 都忘了
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