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If P(A) = 0.5, P(B) = 0.6 and P(A or B) = 0.8, then P(A and B) is
A0.3
B0.1
C0.2
D0.4
Answer & Solution
Correct answer: A. 0.3
Rearranging the addition rule gives 0.5 + 0.6 - 0.8 = 0.3.
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