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Probability puzzle 2 SOLUTION and EXPLANATION

Posted By: Ray Kershaw
Date: Sunday, 28 April 2019, at 5:18 p.m.

In Response To: Probability puzzle 2 SOLUTION and EXPLANATION (Bob Koca)

An alternative explanation:

n players of equal ability.

All possible matches = choose any 2 from n = nC2

Matches played = n-1

Probability that a given match takes place = (n-1) / (nC2) =

(n-1) / [n(n-1)/2] = 2 / n for n > 1

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