Find how many $7$ letter words can be formed using the letters of the word $A R I H A N T$ .

2520

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5040

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3600

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7200

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Solution

The correct option is C 2520
$A R I H A N T$ contains seven letters in which only $A$ is repeated twice.
Hence number of $7$ letters word formed is $= \frac{7!}{2!} = 2520$

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