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Reported Question / Answer
Q.) If two events X and Y are considered as partially overlapping events then the rule of addition can be written as
1)
P(X or Y) = P(X) - P(Y) + P(X and Y)
2)
P(X or Y) = P(X) + P(Y) * P(X - Y)
3)
P(X or Y) = P(X) * P(Y) + P(X - Y)
4)
P(X or Y) = P(X) + P(Y) - P(X and Y)
5)
NULL
Answer :
4
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