Arrange letters of word ZENITH in alphabetical order. E,H,I,N,T,Z Thus words starting with E,H,I,N,T = 5*5! Now words with Z started ZEH- 3! , ZEI-3!, ZENH-2! ,ZENITH-1 5*5! + 2*3! +2!+1 = 615
The letters of the word ZENITH are permuted and are arranged in an alphabetical order as in an English dictionary.
Then, the rank of the word ZENITH is ___