36 people {a1, a2, ..., a36} meet and shake hands in a
circular fashion. In other words, there are totally 36
handshakes involving the pairs, {a1, a2}, {a2, a3}, ...,
{a35, a36}, {a36, a1}. Then size of the smallest set of
people such that the rest have shaken hands with at least
one person in the set is

a)12 b)11 c)13 d)18

Answer Posted / rubi

ans is 18
a single person can do maximum 2 handshakes..so 36/2=18

Is This Answer Correct ?    27 Yes 59 No



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