Question

Four people come to a party and shake hands with each other. if each person shakes the hand of every other​ person, how many handshakes​ occur?

Answer 1

four person shakes the hand this means 1st person shakes hand with other 3 and 2nd person shakes with other two (excluding 1st person)
3rd person shakes with 4th person ( excluding 1st and 2nd)
Total handshakes are = 3+2+1=6