1. ## permutation and combination

Calculate number of ways
(a) 5 children can be divided into group of 2 and 3,(ans: 10)
(b) 9 children can be divided into group of 5 and 4,(ans: 126)
Hence calculate number of ways in which 9 children can be divided into groups of 2,3 and 4.(ans: 1260)

thank for tour time and help

2. Originally Posted by nikk
Calculate number of ways
(a) 5 children can be divided into group of 2 and 3,(ans: 10)
(b) 9 children can be divided into group of 5 and 4,(ans: 126)
Hence calculate number of ways in which 9 children can be divided into groups of 2,3 and 4.(ans: 1260)
You have the answers, so what is the question?
Do you want to know how?
$\frac{9!}{(2!)(3!)(4!)}=1260$

3. Originally Posted by Plato
You have the answers, so what is the question?
Do you want to know how?
$\frac{9!}{(2!)(3!)(4!)}=1260$
i don't no how to calculate it sir.tq for your step. how abour a&b

4. Originally Posted by nikk
i don't no how to calculate it sir.tq for your step. how abour a&b
If that is true then why are you asked to do these problems?