probability of 2 segments from 10 points on a circle intersect
Source: OLCOMA Costa Rica National Olympiad, Final Round, 2018 3.1
September 20, 2021
geometrycombinatorial geometrycombinatorics
Problem Statement
There are points on a circle and all possible segments are drawn on the which two of these points are the endpoints. Determine the probability that selecting two segments randomly, they intersect at some point (it could be on the circumference).