SOLUTION: p(a)=0.7 p(aub) =0.9 p(anb)=0.3 whats is p(b)

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Question 1049649: p(a)=0.7 p(aub) =0.9 p(anb)=0.3
whats is p(b)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(aub) = p(a) + p(b) - p(anb)
.9 = .7 + p(b) - .3
.5 = p(b)