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Mutually exclusive events A and B have P(A) = 0.35 and P(A or B) = 0.8. Find P(B).

A0.55
B1.15
C0.45
D0.28
Answer & Solution
Correct answer: C. 0.45
Since the chances add, P(B) = 0.8 - 0.35 = 0.45.
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