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The probability that a student passes at...

The probability that a student passes at least in one of the three examinations A,B,C is 0.75, the probability that he passes in atleast two of the exams is 0.5 and the proabability he passes exactly two of the exams is 0.4 . If `alpha,beta, gamma`, are respectively the probabilities of the student passing in A,B,C then.

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