Mathematics for IGCSE & O level - Probability (Section 2 - No. 45)
Two events A and B are mutually exclusive and P(A) = 0.3, P(B) = 0.5. Find P(A or B).
0.8
0.15
0.25
0.35
Explication
Since they're mutually exclusive, P(A or B) = P(A) + P(B) = 0.3 + 0.5 = 0.8.