1.

If the different permutations of all the letter of the word EXAMINATION are listed as in a dictionary, how many words are there in this list before the first word starting with E?

Answer» There will be `2I,2N,1A,1E,1X,1M, 1T,1O` in the words starting with A.
No. of words starting from `A = (10!)/(2!2!) = 907200`
After if, there will be words starting with `E, I,M, N,O,T,X`.
Therefore, the total no. of words before the words starting with E
`= 907200`


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