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Let A and B be two events such that P( B A ∪ ) = 6 1 , P(A ∩ B) = 4 1 and P( A ) = 4 1 , where A stands for the complement of the event A. Then the events A and B are :

1. independent and equally likely
2. mutually exclusive and independent
3. equally likely but not independent
4. independent but not equally likely

Correct answer: independent but not equally likely

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