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15-11-2017
Mathematics

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Suppose there are 15 people in a room. each of those 15 shakes hands exactly once with everyone else. how many handshakes take place?

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15-11-2017

105. Each of the 15 people shakes hands with another 14 people But 1 person shaking hands with another person is the same as the other person shanking hand with that person so divide by half. 15*14=210/2=105

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