Mathematics, 25.05.2021 16:50 scottbrandon653

Of the 10 kids in a chess club, 5 are left-handed and 5 are right-handed. The club holds a round-robin tournament in which every player plays against every other player exactly once. Of all the matches, how many of them have a left-handed player competing against a right-handed player?

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Of the 10 kids in a chess club, 5 are left-handed and 5 are right-handed. The club holds a round-rob...