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anonymous
 one year ago
How may permutations of the word “spell” are there? There are____________
anonymous
 one year ago
How may permutations of the word “spell” are there? There are____________

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can anyone help????????

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0The number of permutations with repeats is \(\Large \frac{N!}{n_1!n_2!...n_k!}\) where N=total number of items k=number of types of items n1,n2...nk=number of items of each type. For unique items, put n=1 Note that \(\sum_1^k n_k = N\) Example: How many permutations can we form with the word parallel? there are 2a's, 1e, 3l's, 1p, 1r for a total of 8 letters. The permutation is therefore \(\Large \frac{8!}{2!1!3!1!1!}=\frac{40320}{2\times1\times6\times1\times1 }=3360\) See also following link if you need more explanations: http://www.mathwarehouse.com/probability/permutationsrepeateditems.php
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