IIT JEE Advanced 2007 Paper 2

The given word is COCHIN. That is,
C, C, H, I, N, O
The number of words starting with CC = 4! = 24.
The number of words starting with CH = 4! = 24.
The number of words starting with CI = 4! = 24.
The number of words starting with CN = 4! = 24.
Now, the first word of the series CO is COCHIN.
Therefore, the number of words that appear before the word COCHIN is 96.