If the letters of the word SACHIN are arranged in all possible ways and these words are written out as in dictionary, then the word SACHIN appears at serial number

A C H  I N SS ACH I N The word SACHIN is starting with S. Words starting with each of A, C, H, I, N are ahead of those words starting with S.Number of such words =   5! + 5! + ⋯ 5 times =5 x 5!The first word starting with S is SACHIN. rank=5.5!+1=601