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?
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Originally Posted by offahengaway and chips How many 10 letter combinations can be selected from 17 different letters? $\displaystyle \binom{N}{K}=\frac{N!}{K!(N-K)!}$ $\displaystyle N=17~\&~K=10$
Would it not be (11 P 2)
Originally Posted by offahengaway and chips Would it not be (11 P 2) No. Does it permutations? Dose not say combinations?
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