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Show that the probability that exaclty o...

Show that the probability that exaclty one of the events A and B occurs is P(A) + P(B) - 2P(AB).

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The correct Answer is:
`P(A_(1)cup A_(2) cup A_(3)) = P(A_(1)) + P(A_(2)) + P(A_(3))`
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CHHAYA PUBLICATION-PROBABILITY-VERY SHORT ANSWER TYPE QUESTION
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