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P(A) = 1/3, P(B) = 1/2, P(A ∩ B) = 1/6. P(A ∪ B) =
A1
B1/3 + 1/2 - 1/6 = 2/3
C1/2
D5/6
Answer & Solution
Correct answer: B. 1/3 + 1/2 - 1/6 = 2/3
Inclusion-exclusion: P(A ∪ B) = P(A) + P(B) - P(A ∩ B) = 2/6 + 3/6 - 1/6 = 4/6 = 2/3.
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