hello what is the permutation for determining the letters of a word DEAFEATED in which the E's are seperate from each other..
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Originally Posted by sigma1 hello what is the permutation for determining the letters of a word DEAFEATED in which the E's are seperate from each other.. without any condition , the number of permuatation of this word is \frac{9!}{3!2!2!}=15120 when all the 'E's are to be together , no of permutations : \frac{7!}{2!2!}=1260 so when all the 'E's are not to be together , no of permutations =15120-1260
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