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JEE Main Mathematics question

MathematicsPermutations and CombinationsJEE Main

Everybody in a room shakes hands with everybody else. The total number of hand shakes is . The total number of persons in the room is

Answer: (B)

Solution

For persons, each pair shakes hands once, so the number of handshakes is $Missing argument for \binom\binom

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Question ID VK-020577