10 professionals and 6 amateurs in a badminton competition
Source: Portugal OPM 2022 p5
May 15, 2024
combinatorics
Problem Statement
In a badminton competition, players participate, of which are professionals and are amateurs. In the first phase, eight games are drawn. Among the eight winners of these games, four games are drawn. The four winners qualify for the semi-finals of the competition. Assuming that, whenever a professional player and an amateur play each other, the professional wins the game, what is the probability that an amateur player will reach the semi-finals of the competition?