SOLUTION: In a gathering, the host makes sure that each guests shakes hand everyone else. If there are 25 guests, how many handshake will be done?

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Question 1180223: In a gathering, the host makes sure that each guests shakes hand everyone else. If there are 25 guests, how many handshake will be done?
Answer by greenestamps(13203) About Me  (Show Source):
You can put this solution on YOUR website!


Each pair of people determines one handshake.

The number of pairs of people in a group of 25 is C(25,2)=300.

ANSWER: 300 handshakes