MathDB
Miklos Schweitzer 1952_6

Source:

October 12, 2008
probabilityratioprobability and stats

Problem Statement

Let 2n 2n distinct points on a circle be given. Arrange them into disjoint pairs in an arbitrary way and join the couples by chords. Determine the probability that no two of these n n chords intersect. (All possible arrangement into pairs are supposed to have the same probability.)