Question

Ten people meet and everyone shakes hands exactly once with everyone else. What is the total number of handshakes

Answer 1

10 people
so each person shakes hands with 9 person.

9 x 10 = 90 handshakes altogether

Answer 2

Each person shakes hands with 9 people.

There are 10 people.

10 x 9 = 90

Answer: 90 handshakes