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probablity of union

probabilty of union is define as

P(AUB)=P(A)+P(B)-P(AnB) (for not mutualy exclusive data( where atleast one event

is common in two samples)

P(AUB)=P(A)+P(B) (mutualy exculsive)

probablity of intersect

P(AnB)=P(A).P(B)

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