Statisticshard · Past Paper

A and B are independent events. If P(A)=0.5 and P(B)=0.2, find P(A or B).

A0.7
B0.6
C0.1
D0.5

✓ Correct Answer: B — 0.6

P(A or B) = P(A) + P(B) - P(A and B). P(A and B) = 0.5*0.2 = 0.1. Result = 0.5+0.2-0.1 = 0.6.

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