In a get-together party, every person present shakes the hand of every other person. If there were 90 handshakes in all,

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answerhappygod
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In a get-together party, every person present shakes the hand of every other person. If there were 90 handshakes in all,

Post by answerhappygod »

a) 15
b) 14
c) 16
d) 17
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