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Quantitative Aptitude

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Permutation, Combination & Probability

Question
20 out of 20
 

In how many different ways can the letters of the word 'DETAIL' be arranged in such a way that the vowels occupy only the odd positions?



A 32
B 48
C 36
D 60
E 120

Ans. C D E T A I L

There are three vowel it will be filled on 1st , 3rd and 5th place. So possible permutation be 3! = 6

Rest digit be filled on 2nd, 4th and 6th place

Total permutation be 3! = 6

Total permutation be 6 x 6 = 36

Permutation, Combination & Probability Flashcard List

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