1. ## Combination problem

Hi , getting a little stuck with this question, any advice would be great,

How many 10 letter combinations can be selected from 17 different letters?

2. Originally Posted by offahengaway and chips
How many 10 letter combinations can be selected from 17 different letters?
$\binom{N}{K}=\frac{N!}{K!(N-K)!}$ $N=17~\&~K=10$

3. Would it not be (11 P 2)

4. Originally Posted by offahengaway and chips
Would it not be (11 P 2)
No. Does it permutations?
Dose not say combinations?