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MathematicsMathematics
20 July, 23:16

Five friends are having tennis tournament. Each friend play the other four friends once. How many matches will be played?

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  1. 21 July, 02:10
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    10 matches.

    Player A, B, C, D, E

    A-B, A-C, A-D, A-E

    B-C, B-D, B-E

    C-D, C-E

    D-E

    This is one match each per person.

    A-B in first match. So if you go to B bracket. He can't play A again, so A is not included. And naturally he cannot play himself. B-B cannot happen. So you start as B-C.
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