Everybody in a room shakes hand with everybody else. The total number of hand shakes is 66. Then the number of person in the room are

E

Editor

Sep 18, 2022

Everybody in a room shakes hand with everybody else. The total number of hand shakes is 66. Then the number of person in the room are

Difficulty: Easy

A:

12

B:

8

C:

11

D:

6

ID: 63273dbaca83163ac3a124c3