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What is the probability of getting a sum 9 from two throws of a dice?

Question: What is the probability of getting a sum 9 from two throws of a dice?
[A].

1
6

[B].

1
8

[C].

1
9

[D].

1
12

Answer: Option C

Explanation:

In two throws of a dice, n(S) = (6 x 6) = 36.

Let E = event of getting a sum ={(3, 6), (4, 5), (5, 4), (6, 3)}.

P(E) = n(E) = 4 = 1 .
n(S) 36 9