- #1

erisedk

- 374

- 7

## Homework Statement

Three children, each accompanied by a guardian, seek admission in a school. The principal wants to interview all the 6 persons one after the other subject to the condition that no child is interviewed before its

guardian. In how many ways can this be done ?

## Homework Equations

## The Attempt at a Solution

So, I read the solution to this problem, because I could only work it out with a lot of casework (I did get the right answer), but this question wasn't supposed to be that time consuming.

So, here's what I read--

No. of ways = 6C2 * 4C2 * 2C2 = 90

That doesn't make much sense to me. Help?