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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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A pair of die is rolled six times. Find the probability that a third sum of seven is obtained at the sixth throw. Select the correct answer from above options

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`5C_2*(1/6)^2*(5/6)^3*1/3` `(5!)/((2!*3!))*1/36*(5/6)^3*1/6` `5*4/2*1/36*(5/6)^3*1/6` `5^4/(6^5*3)`.

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