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  4. 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 19 text th word?

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Q. 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 $19^{\text {th }}$ word?

KCETKCET 2022Permutations and Combinations

Solution:

$A\, K\, M \,S$
$A \rightarrow 3 !$
$K \rightarrow 3 !$
$M \rightarrow 3 !$
$SAKM \rightarrow \frac{1}{19}$