If all permutations of the letters of the word MASK are arranged in the order as in dictionary with or without meaning, which one of the following is 19th word?
KCET 2022
Solution
The correct answer is SAKM
Explanation
As the letters are arranged in the order as in dictionary, they will be in alphabetical order as in AKMS
Number of words created starting with letter A = $3 ! = 6$
Number of words created starting with letter K = $3 ! = 6$
Number of words created starting with letter M = $3 ! = 6$
The 19th word would start with letter S. As the rest of the letters would be arranged alphabetically, the word would be SAKM.