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Nine people in a room shake hands such that eachperson has shaken hands with everyone else.How many handshakes altogether?
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Each person shakes hands with every person except themselves: 9*8=72 handshakes.
by Top Rated User (1.2m points)
v~~Nine people in a room shake hands such that eachperson has shaken hands with everyone else.How many handshakes altogether?

9x9=81
by

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