Apoorv jaiswal

CAT Preparation Community 3y ago

In how many ways 9 friends - Alok, Badal, Carol, Dorothy, Emily, Frank, Govind, Harish and Indivar; be divided equally into 3 groups?... In this question why will we divide by 3! at last...I didn't understand from video solution.Please explain the concept of dividing by 3 factorial ?