Mathematics for IGCSE & O level - Probability (Section 2 - No. 41)
If the probability of an event, A, is 0.4 and the probability of event B is 0.5, what is the probability that either A or B occurs if they are mutually exclusive?
0.9
0.2
0.45
0.1
Paliwanag
For mutually exclusive events, P(A or B) = P(A) + P(B) = 0.4 + 0.5 = 0.9