Mathematics for IGCSE & O level - Probability (Section 2 - No. 14)
Two events are *mutually exclusive*. Event A has a probability of 0.4. Event B has a probability of 0.3. What is the probability of event A OR event B occurring?
0.7
0.12
0.3
1.0
解释
For mutually exclusive events, P(A or B) = P(A) + P(B). Therefore, 0.4 + 0.3 = 0.7