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If P(A/B)=1/4 and P(A∩B) =1/5 then P(B) is ______...
1.
If P(A/B)=1/4 and P(A∩B) =1/5 then P(B) is ________________?
A.
4/5
B.
1/20
C.
0
D.
1/9
Answer» B. 1/20
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