How many words can be formed by re-arranging the letters of the word 'INFINITY', which begins with letter Y ?
ANSWERS
We have to fix 'Y' at the first place.
Now, 7 letters are left i.e. I, N, F. I, N, I, T out of which I is coming twice and N is also coming twice.
So, 7! / 2! × 2!
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