Question

If all the letters of the word $PARIS$ are rearranged to form $5$ letter words and arranged in ascending order as in a dictionary, then the rank of the word $PARIS$ is

Answer 1

Letters starting with $A$ in the dicitionary $=4!=24$
Letters starting with $I$ in the dicitionary $=4!=24$
Words starting with $PAI=2$ words
Now word $PARIS=1$ word
$\therefore$ Rank $={51}^{th}$