= The probability of the union of two events is
P(AuB) = P(A) + P(B) - P(AnB)
= If both events are mutually exclusive, i.e. they cannot occur at the same time, then P(AB) = P(A) + P(B)EXAMPLE:
P(Red U Ace) = P(Red) + P(Ace) - P(Red ∩ Ace) = 26/52 + 4/52 - 2/52 = 28/52
