SOLUTION: In a round robin tennis tournament, every player plays against every other player. If 11 players are entered in a round robin tennis tournament, how many matches will be played?

Hi, sry, forgot to divide by 2.



*Note: Each player plays 10 matches

There are 11 players total

In general, If n is the number of competitors, a pure round robin tournament requires (n/2)(n-1) games. 

(If n is even, then in each of (n − 1) rounds,  n/2 games could be run in parallel.

If n is odd, there will be n rounds with (n-1)/2 games and one competitor having no game in that round.)



110/2 or 55 matches will be played in this round robin tennis tournament