Statisticsmedium · Past Paper
A and B are two events such that P(A)=0.3, P(B)=0.6 and P(A and B)=0.1. Find P(A or B).
A0.9
B0.8
C0.7
D1.0
✓ Correct Answer: B — 0.8
P(A or B) = P(A) + P(B) - P(A and B) = 0.3 + 0.6 - 0.1 = 0.8.
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