Question

Please I need answer quickly

how many ways can you form 3 groups from 18 people so that there's 3 people in first group, 6 people in the second group and 9 people in third

Answer 1

4 084 080 ways

Explanation:

The number of ways is :

`C^(3)_(18)* C^(6)_(15)* C^(9)_(9)`

___________

Since

18C3=816

15C6=5 005

9C9=1

then

`C^(3)_(18)* C^(6)_(15)* C^(9)_(9)=816*5005*1= 4\ 084\ 080`