Solution
We know that when there are two dice thrown, there are 36 possible outcomes.
(1,1), (1,2)......(1,6)
(2,1), (2,2),.....(2,6)
..
(6,1), (6,2), .....(6,6)
We need to get a sum of 9
(3,6),(4,5),(5,4),(6,3)
Thus, there are four possibilities.
Therefore, the probability of getting a sum of 9 = 4/36 = 1/9
Option B is the correct answer.
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