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Question

Mathematics Question on Permutations

All the letters of the word ANIMALANIMAL are permuted in all possible ways and the permutations thus formed are arranged in dictionary order. If the rank of the word ANIMALANIMAL is xx . then the permutation with rank xx , among the permutations obtained by permuting the word PERSONPERSON and arranging the permutations thus formed in dictionary order is

A

ENOPRS

B

NOSPRE

C

NOEPRS

D

ESORNP

Answer

ESORNP

Explanation

Solution

If we arrange the letter of word ANIMAL in alphabetic order then, we get AAILMN, now to find the rank of word ANIMAL, xx (given)

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Now, similarly for word PERSON, if we arrange the letters in alphabetic order, we get ENOPRS, now to find the word having 107 ways,

So, ESORNP is required word.