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if there are 2 people in a room and each one shakes hands once with every other person in the room, how many hand shakes are there?...
answer( 1 handshake) pretty easy isn't it?
if there are 3 people in a room and everyone shakes hands with everyone else, how many hand shakes are there?
answer( three handshakes)
now how many handshakes will there be for 5 people in a room?
its your time to shyne...
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