IN a meeting everyone had shaken hands with everyone else, it was found that 66 handshakes were exchanged . Number of persons present in the meeting is

It was found at a certain dinner meeting that after every member had shaken hand with every other members, 45 handshakes were interchanged. How many members were present at the meeting?

After a meeting, every participant shakes hands with every other participants. If number of handshakes is 66, find the number of participants in the meeting.

Everybody in a room shake hands with everybody else. If the total number of handshakes is 66, then the number of persons in the room is-

Everybody in a room shake hands with everybody else. If the total number of handshakes is 66, then the number of persons in the room is-

Everybody in a room shakes hands with everybody else. The total number of handshakes is 45. The total number of persons in the room is

Every body in a room shakes hands with everybody else. The total number of handshakes is 21. The total number of persons in the room is