Mathematics, 01.07.2019 20:50 DiamondW1258

We select four distinct integers from the set {1,2,…,20} , uniformly at random (all quadruples of distinct integers are equally likely), and arrange them in ascending order. find the probability that after ordering them, the second number is equal to 7 .

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We select four distinct integers from the set {1,2,…,20} , uniformly at random (all quadruples of di...

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