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In a party there are 123 persons present. If each of them shakes.............total how many handshakes will takes place?

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In a party there are 123 persons present. If each of them shakes hand with all the other persons, in total how many handshakes will takes place?

posted Oct 7, 2020 by Amarvansh

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1 Answer

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This problem can be solving by computing the combination of 123 persons in pairs without repetition.
C123,2 = 123! / 2! ( 123 - 2) ! = 122 x 123 / 2 = 7503

answer Nov 3, 2020 by anonymous



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