If A and B are mutually exclusive events and S is the sample space such that
and S = A ∪ B, then P (A) =
Since the event are mutually exclusive the intersection is 0.
Thus P(AUB) = P(A)+P(B)
⇒ P(AUB) = P(A)+3.P(A)
⇒ 1 = 4.P(A)
P(A) = ![]()
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