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If A and B are two independent events, then prove that the probability of occurrence of at least one of A and B is given by 1 - P(A') . P(B')

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If A and B are two independent events, then prove that the probability of  occurrence of at least one of A and B is given by 1 - P(A') . P(B')

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Required probability P(A∪B)

 = P(A)+P(B)-P(A).P(B)

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