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JEE MATHEMATICS MCQ: COMBINATIONS

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If in a chess tournament each contestant plays once against each of the other and in all 45 games are played, then the number of participants is

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Correct option: B

10

Option B (10) is correct because the number of participants is found by solving the combination equation

{{\;^n}{C_2}} = 45

, which results in

n = 10

.

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n