Homework Help: maths

Posted by JaredN4 on Monday, August 13, 2007 at 3:02am.

In a netball competition, there are 9 teams. If each team plays each other twice, what is the total number of games played?

The first round would be 9choose2 games,
which is 9!/(7!2!) = 36

But you are playing two rounds, so the total number of games is 72

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