Let A and B be two events such that P(A)...

Let A and B be two events such that `P(A)=0.3` and `P(AuuB)= 0.8`. If A and B are independent events, then `P(B)=`

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`P(AuuB)=P(A)+P(B)-P(A)P(B)," as A and B are independent events."`
`implies" "0.8=(0.3)+P(B)-(0.3)P(B)`
`implies" "0.5=(0.7)P(B)impliesP(B)=(5)/(7)`

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