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Q. If all the words (with or without meaning) having five letters, formed using the letters of the word $SMALL$ and arranged as in a dictionary; then the position of the word $SMALL$ is:

JEE MainJEE Main 2016Permutations and Combinations

Solution:

$A LL MS A (LL MS) \rightarrow \frac{4 !}{2 !}=\frac{24}{2}=12$
$L ( AL MS ) \rightarrow 4 !=24$
$M (ALLS) \rightarrow \frac{4 !}{2 !}=\frac{24}{2}=12$
$SA ( MLL ) \rightarrow \frac{3 !}{2 !}=3$
$SL ( ALM ) \rightarrow 3 !=6$
Total words $=12+24+12+3+6=57$
$SMALL \,\,\,\,\,58^{t h}$
$\therefore $ the position of the word $SMALL$ is $58^{t h}$