Question
If the letters of the word are arranged as in dictionary, find the rank of the word INDIA.
Joshi sir comment
On arranging the letters in ascending order we will get
A D I I N
total no of words = 5*4*3*2*1/2*1 = 60
rank = (60/5)*2 + (24/4)*3 + (6/3)*1 + (2/2)*1 + 1 = 24+18+2+1+1 = 46
here 60/5 means total words/ total letters and 2 is here because in INDIA, I is first letters and this comes at 3rd and 4th place in ascending order arrangement so total letters before it are 2. similarly 24 stands for total words after removing I from the spelling of INDIA and etc