Question

In a school, there are 11 teachers including the Headmaster. From these 11 teachers, how many committees of 4 teachers including the Headmaster can be made?

Answer 1

"3 committees could be made "
Explaination
Each commitee will consist the head master
so, there should be 3teachers and the headmaster in each group
•: (10-3=7),(7-3=4),(4-3=1) and the 1 left is the headmaster