Question

概率统计题目，求帮忙，高悬赏谢谢！

Answer 1

P(AB')+P(A'B)=0.3
则P(A)-P(AB)+P(B)-P(AB)=0.3
则P(AB)=0.1
P(B/A)=P(AB)/P(A)=0.1/0.2=0.5

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P(AB)=P(A)*P(B/A)=1/12

则P(B)=P(AB)/P(A/B)=1/12 /(1/2)=1/6
则P(A∪B)=P(A)+P(B)-P(AB)=1/4+1/6-1/12=1/3
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C(6,3)/C(11,3)=4/33
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25%*5%+35%*4%+40%*2%=3.45%
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50%*5%+50%*0.25%=2.625%

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1/3*0.02+2/3*0.01=0.0133

Answer 2

这个嘛具体不知道怎么