Question

Please help I will fan and medal!!!

Part A:
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?

Part B:
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.

What fraction of the games are boy-versus-boy? Enter your answer as a fraction in simplified form.

Answer 1

Part C:
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.

If Anita is one of the club members, what fraction of all games at the tournament does Anita play in? Enter your answer as a fraction in simplified form.

Answer 2

@jhonyy9

Answer 3

let five girls A,B,C,D and E

so A play with B,C,D and E so these are 4 games
B play with C,D and E so these are 3 games
C play with D and E so these are 2 games
D play with E so this is a game
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total = ? games