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There are $5$ girls and $5$ boys in a chess club. The club holds a round-robin tournament in which every player plays against every other player exactly once. In how many games does a girl play against another girl?

 

HELP PLEASE

 Feb 8, 2021
 #1
avatar+79 
+1

I belive they play each other in 10 games.

 Feb 9, 2021

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