Mathematics for IGCSE & O level - Probability (Section 1 - No. 29)
If events A and B are mutually exclusive, and P(A) = 0.2 and P(B) = 0.3. What is the probability of either A or B?
0.06
0.5
0.6
1.0
解释
P(A or B) = P(A) + P(B), as they can't happen together.