1At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?
1. 30
2. 14
3. 12
4. 25
Answers
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1
number of handshakes = nC2
n(n-1)/2 = 66. Hence, n = 12.
Ans is 12.
n(n-1)/2 = 66. Hence, n = 12.
Ans is 12.
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