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There are 10 players in a chess tournament. If each game is played by 2 players, and each player plays every other player exactly once, what is the total number of games played in the tournament?

 

Answer Choices 

A. 100

B. 90

C. 50

D. 45

 Feb 7, 2019
 #1
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The number of sets possible from choosing any 2 people from 10  = C(10,2)  =  45

 

cool cool cool

 Feb 7, 2019

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