What would be rank of word RIDER in the dictionary of words formed by letter of word RIDER taken all 5 letter at a time?

Question

Find the rank of the word ANXIETY in the dictionary of the words formed by letters of the word ANXIETY taken all letters of the word.

Answer 1

49
In alphabetical sequence DEIRR
words of D =12
Words of E=12
Words of I=12
Words start with RD=6
words start with RE=6
Then the with RIDER comes
So total 48 words then 49 th word RIDER is

Answer 2

The rank is 120