Question

How many different 3 people committees can be formed from a group of 25 people?

Answer 1

Total number of people = 25

A group of 3 people must form from 25.

so , in C (25,3) ways committees can be formed .

Now ,

C (25,3)

= 25!/(3!×21!)

=25×24×23×22/3×2×1

= 25×23×24/6

=25×23×4

=100×23

=2300