How Many Handshakes?

If there are 3 to 5 people in one group of people trying to handshake each other, the results may vary. With 3 people in one group you can have 3 handshakes. With 4 people you can can have  6 handshakes. And with 5 people you can have 10 handshakes. In the end you'll get 10 handshakes (max) from 5 people in one group. The way to do this experiment is by getting 3-5 group members and try to handshake as many other group members as you can without handshaking a single person twice and once you reach your max, that's how many handshakes you can have. The function rule to finding out how many handshakes can take place with a certain amount of time is F(n)= n(n-1) .  
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