A die is rolled twice. What is the probability of getting a sum equal to 9?
Choose the correct answer:  A) 2/3  B) 2/9  C) 1/3  D) 1/9  E) 1/7
Explanation :   Total number of outcomes possible when a die is rolled = 6 (âˆµ any one face out of the 6 faces)   Hence, total number of outcomes possible when a die is rolled twice, n(S) = 6 Ã— 6 = 36   E = Getting a sum of 9 when the two dice fall = {(3, 6), {4, 5}, {5, 4}, (6, 3)}   Hence, n(E) = 4   P(E) = n(E)/n(S)=4/36=1/9   ANSWER IS 1/9
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A die is rolled twice. What is the probability of getting a sum equal to 9?