Asked by “My shoes!” “Oh My Shoes!!!”
There are 20 players in a table tennis competition. Each player must play exactly one match against every other player. How many matches are there in the competition?
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Answered by
mathhelper
number of games = 20(19)/2 = 190
We have to divide by 2 since games like A vs B and B vs A are the same game.
We have to divide by 2 since games like A vs B and B vs A are the same game.
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