At a party, everyone shook hand with everybody else. It there were 66 handshakes, how many people were at were at the party? <br>

1. At a party, everyone shook hand with everybody else. It there were 66 handshakes, how many people were at were at the party?

[Jamuna Bank PO-2014 : 2014
BKB Senior Officer-2012 : 2012]

1. 9

2. 10

3. 12

4. 13

5. none of these

Answer

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