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Use the given information to find the indicated probability.p(a ∪ b.= .9, p(b) = .8, p(a ∩ b.= .4.find p(a).p(a) = incorrect: your answer is incorrect.
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Use the given information to find the indicated probability.p(a ∪

b.= .9, p(b) = .8, p(a ∩
b.= .4.find p(a).p(a) = incorrect: your answer is incorrect.

User Will Decker
by
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1 Answer

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P(A\cup B)=P(A)+P(B)-P(A\cap B)

0.9=P(A)+0.8-0.4\implies P(A)=0.5
User Francis Lee
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