来自罗亚松的问题
概率论:P(A)=0.5P(B)=0.6P(B|A)=0.8求P(A逆B逆)
概率论:P(A)=0.5P(B)=0.6P(B|A)=0.8求P(A逆B逆)
1回答
2020-05-18 18:59
概率论:P(A)=0.5P(B)=0.6P(B|A)=0.8求P(A逆B逆)
概率论:P(A)=0.5P(B)=0.6P(B|A)=0.8求P(A逆B逆)
P(AB)=P(A)P(B︱A)=0.5×0.8=0.4
P(A∪B)=P(A)+P(B)-P(AB)=0.5+0.6-0.4=0.7
P(A逆B逆)=1-P(A∪B)=1-0.7=0.3