a. P(A) = 0.36 P(B|A) = 0.87 P(A and B ) =$ P(A) \times P(B|A) $ $= 0.36 \times 0.87$ =0.3132 b. P(B) = 0.53 P(A|B) = 0.22 P(A and B ) =$ P(B) \times P(A|B) $ $= 0.53 \times 0.22$ =0.1166
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