Permutations and combinations - Quantitative Aptitude (MCQ) questions for Q. 783

Q.  How many 3-letter words can be formed out of the letters of the word ‘CORPORATION’, if repetition of letters is not allowed?
- Published on 06 Jul 15

a. 990
b. 336
c. 720
d. 504

ANSWER: 336
 
There are in all 11 letters in the word ‘CORPORATION’. Since repetition is not allowed, there are 8 different letters that can be used to form 3-letter word.

Therefore, total number of words that can be formed = 8P3 = (8*7*6)

= 336

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