Question

In how many ways can 15 people be divided into two groups, one group with 10 and the other with 5 people?

Answer 1

Answer:

Step-by-step explanation:

Given that there are 15 people and they should be divided into two groups one with 10 and the other with 5 people.

First group 10 persons can be selected from 15 in 15C10 ways.

Remaining 5 would automatically be put in group 2.

Hence no of ways $= 15C5 =\frac{15!}[10!5!} \\=3003$