Statisticsmedium · Past Paper
In a class, the probability of a student passing in Math is 0.8 and in Science is 0.7. If the probability of passing both is 0.6, what is the probability of passing in at least one?
A0.9
B1.5
C0.1
D0.8
✓ Correct Answer: A — 0.9
P(A or B) = P(A) + P(B) - P(A and B) = 0.8 + 0.7 - 0.6 = 0.9.
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