Problem
COM-B1-M12-P008 Set 2. Everyone Played
#8
★★☆☆☆ Level 2 of 5
In a tournament with \(7\) players, everyone played everyone exactly once. How many games were played?
A game is a pair of players.
The number of games equals the number of pairs of players: \(\binom{7}{2}=21\).
Complete graph as a tournament.