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What is the total number of handshakes among (14) persons?

Answer and explanation

Correct answer: 91

Each handshake corresponds to one pair of distinct persons, and each pair is counted only once. Therefore, the total number of handshakes is \(\binom{14}{2}=\frac{14\times13}{2}=91\). The value 182 results from counting every pair twice. Exam tip: for handshake questions, usually use \(\binom{n}{2}\).

Related tags

CombinationsHandshake ProblemPair SelectionClass 11Permutations And CombinationsMathematicsClass 11 Mcq

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