posted by Shay on .
seven people meet and shake hands with eachother- how many handshakes occur?
using inductive reasoning, write a formula for the number of handshakes if the number of people is n
nCr = n!/(r!*(n-r)!) Think about that.
You need to go through the reasoning. Try making a diagram with 4 folks (A,B,C,D) shaking hands