8 若 P(A|B) = 0.25，P
(B) = 0.3，P(B|A) = 0.5，則 P
(A) =？
(A)0.55
(B)0.6
(C)0.125
(D)0.15

答案：登入後查看
統計： A(2), B(10), C(5), D(114), E(0) #1204339

詳解 (共 1 筆)

#1420642
P(A∩B)=P(B)*P(A|B)=0.3*0.25=0.075
 
P(A∩B)=P(A)*P(B|A)
0.075=P(A)*0.5
P(A)=0.075/0.5=0.15
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