1.

If P (A) = 0.4,P (B | A)= 0.3 and P (B^c | A^c)=0.2. find P ( B | A^c)

Answer»

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SOLUTION :`P(B|A^c)=(P(BcapA^c))/(P(A^C))=(P(B-A))/(1-P(A))`
`=(P(B)-P(A capB))/(1-P(A))=(0.6-0.12)/(1-0.4)=0.48/0.6=0.8=4/5`


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