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

Explanation

For mutually exclusive events: P(A or B) = P(A) + P(B) = 0.3 + 0.4 = 0.7

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