12 students, n perfomances, 6 in each , largest n
Source: 21st Philippine Mathematical Olympiad 2019 p2 PMO
January 7, 2020
combinatoricsdouble counting
Problem Statement
Twelve students participated in a theater festival consisting of different performances. Suppose there were six students in each performance, and each pair of performances had at most two students in common. Determine the largest possible value of .