JEE Advanced 2007 Mathematics question
The letters of the word COCHIN are permuted and all the permutations are arranged in an alphabetical order as in an English dictionary. The number of words that appear before the word COCHIN is
Answer: (C)
Solution
Letters in alphabetical order: C, C, H, I, N, O. Every word before COCHIN begins with C (no letter comes before C). With first letter C the remaining letters are C, H, I, N, O (all distinct). Words with second letter
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