16 students took part in a competition
Source: China TST 1992, problem 1
June 27, 2005
combinatoricscombinatorics solvedProbabilistic Methoddouble countingChinaChina TSTmaximum
Problem Statement
16 students took part in a competition. All problems were multiple choice style. Each problem had four choices. It was said that any two students had at most one answer in common, find the maximum number of problems.