Mathematics for IGCSE & O level - Probability (Section 4 - No. 38)
If two events, A and B, are mutually exclusive and P(A) = 0.3 and P(B) = 0.4, what is P(A or B)?
0.12
0.7
0.3
0.4
Giải thích
For mutually exclusive events: P(A or B) = P(A) + P(B) = 0.3 + 0.4 = 0.7