Statisticsmedium · Past Paper
The probability of solving a problem by student A is 1/2 and by B is 1/3. If both try, what is the probability that the problem is solved?
A1/6
B5/6
C2/3
D1/2
✓ Correct Answer: C — 2/3
P(A or B) = P(A) + P(B) - P(A and B) = 1/2 + 1/3 - (1/2 * 1/3) = 5/6 - 1/6 = 4/6 = 2/3.
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