Question
Mathematics Question on Permutations
All the letters of the word ANIMAL are permuted in all possible ways and the permutations thus formed are arranged in dictionary order. If the rank of the word ANIMAL is x . then the permutation with rank x , among the permutations obtained by permuting the word PERSON 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, x (given)
undefined
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.