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If P(A) = 0.4, P(B) = 0.7 and A and B are independent, what is P(A ∩ B)?

Answer and explanation

Correct answer: 0.28

For independent events, the governing multiplication rule is P(A ∩ B) = P(A)P(B). Substituting the given values gives 0.4 × 0.7 = 0.28, so option B is correct. The values 0.40 and 0.70 represent the separate probabilities of A and B, not their intersection. The value 0.11 has no basis in the stated rule.

Related tags

ProbabilityIndependent EventsIntersectionMultiplication Rule

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