求详细的答题过程,可手写。
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P(A)=1/3, P(A|B)=2/3, P(~B|A)=3/5
To find :P(AUB)
Solution:
P(~B|A)=3/5
P(~B∩A) /P(A) = 3/5
[ P(A) -P(A∩B) ]/P(A) = 3/5
1/3 -P(A∩B) = 1/5
P(A∩B) = 2/15
---------------------
P(A|B)=2/3
P(A∩B)/P(B) =2/3
P(B) = (3/2)P(A∩B)
=(3/2)(2/15)
=1/5
------------
P(AUB)=P(A)+P(B)-P(A∩B) = 1/3 +1/5 - 2/15 = 2/5
To find :P(AUB)
Solution:
P(~B|A)=3/5
P(~B∩A) /P(A) = 3/5
[ P(A) -P(A∩B) ]/P(A) = 3/5
1/3 -P(A∩B) = 1/5
P(A∩B) = 2/15
---------------------
P(A|B)=2/3
P(A∩B)/P(B) =2/3
P(B) = (3/2)P(A∩B)
=(3/2)(2/15)
=1/5
------------
P(AUB)=P(A)+P(B)-P(A∩B) = 1/3 +1/5 - 2/15 = 2/5
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