Question

21 people meet and shake hands. The maximum number of handshakes possible if there is to be no cyde of
handshakes is? (A cycle of handshakes is a sequence of people a1, a2, ..., ak such that the pairs tan.az). 2, 3).
(k-1). ak). (ak al) shake hands)​

Answer 1

Answer:

Here is your answer

it is n-1= 21-1= 20

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