Question

If there are 30 people in a room and if they all will shake hands with each other. Then how many hand shakes will take place in that room? Explain.​

Answer 1

Answer:

The total number of handshakes between "n" people can be defined as S = [(n - 1)(n - 1 + 1)]/2 or (n(n - 1)/2.

=[30(30-1)/2]

=[30*29/2]

=(15*29)

=435

So the total no of handshakes are 435