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From the set 1 2 3 n k distinct

From the set {1, 2, 3,... , n}, k distinct integers are selected at random and arranged in numerical order (from lowest to highest). Let P(i, r, k, n) denote the probability that integer i is in position r. For example, observe that P(1, 2, k, n) = 0, as it is impossible for the number 1 to be in the second position after ordering.

(a) Compute P(2, 1, 6, 10).

(b) Find a general formula for P(i, r, k, n).

(a) Compute P(2, 1, 6, 10).

(b) Find a general formula for P(i, r, k, n).

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