A pair of die is rolled six times. Find the probability that a third sum of seven is obtained at the sixth throw.

A pair of die is rolled six times. Find the probability that a third s

1.	A pair of die is rolled six times. Find the probability that a third sum of seven is obtained at the sixth throw.
Answer» `5C_2(1/6)^2(5/6)^31/3` `(5!)/((2!3!))1/36(5/6)^31/6` `54/21/36(5/6)^31/6` `5^4/(6^53)`.

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A pair of die is rolled six times. Find the probability that a third sum of seven is obtained at the sixth throw.

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