Two fair dice are thrown together. What is the probability that the sum of the outcomes is at least 10?
A1/6CORRECT
B1/4
C5/36
D1/12
GCEFurther MathematicsProbability and Statistics2020
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Why the answer is A, and why the others tempt you.
Total outcomes = 36. Outcomes with sum ≥ 10: sum 10 → (4,6),(5,5),(6,4) = 3; sum 11 → (5,6),(6,5) = 2; sum 12 → (6,6) = 1. Total favourable = 6. P = 6/36 = 1/6.
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