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5 friend's are having a tennis tournament.Each friend will play the other 4 friend once. How many matches will be played
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5 friend's are having a tennis tournament.Each friend will play the other 4 friend once. How many matches will be played

User Sank
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1 Answer

5 votes
The handshake problem!
Each of the five will play against 4 others, but since A vs B can be considered the same game as B vs A, so there are 5*4/2=10 matches.

User Dozatron
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7.9k points
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