1.

Two numbers x and y are chosen at random from {1, 2, 3,…,5n} where n ge 2, show that the probability x^(4) - y^(4) is divisible by 5 is (17 n - 5)/(5(5n - 1)).

Answer»


ANSWER :`(17N - 5)/(5(5N - 1))`


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