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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
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Answer Posted / brajendra tripathi
if in question it is said that handshake should be simulanouly then obviosly 18 ans .bt it is not said so 12 peole is enough to make hanshake with 36 people.
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