MathDB
10 professionals and 6 amateurs in a badminton competition

Source: Portugal OPM 2022 p5

May 15, 2024
combinatorics

Problem Statement

In a badminton competition, 1616 players participate, of which 1010 are professionals and 66 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?