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How many words can be formed from the letters of the word 'TRIANGLES'. If 'N' is always in the middle?

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Verified by Experts

No. of letters in the words 'TRIANGLES' = 9
If N is always in the middle, then the number of arrangement of remaining 8 letters at remaining 8 places `= .^(8)P_(8) = 8! = 40320`.
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