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Statistics, Conditional Probability and Random Variables — Lesson quiz

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1.
For two events with P(A) = 0.3, P(B) = 0.5 and P(A ∩ B) = 0.15, which statement is true?
A and B are not independent, since P(A ∩ B) is less than P(B)
A and B are independent, since P(A ∩ B) = P(A) × P(B)
A and B are independent, since P(A) is less than P(B)
A and B are not independent, since P(A) + P(B) ≠ 1