The probability of event A is 40%. The probability of event B is 60%. The joint probability of AB is 40%. The probability that A or B occurs or both occur is closest to:
Calculate and interpret 1) the joint probability of two events, 2) the probability that at least one of two events will occur, given the probability of each and the joint probability of the two events, and 3) a joint probability of any number of independent events.
P (A or B) = P(A) + P(B) – P(AB) = 40 + 60 - 40 = 60.