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OpenStudy (anonymous):
Events A and B are independent. If P(A) = 0.5 and P(B) = 0.4, (a) calculate the probability of P(A U B) (b) determine whether A' and B' are (i) mutually exclusive; (ii) independent.
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OpenStudy (marigirl):
P(A U B) = P(A) + P(B) - P(A).P(B)
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