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The total number of 9 digit numbers which have all different digits is

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The total number of 9 digit numbers which have all different digits is 

A. 10!  B. 9! C. 9 × 9! D. 10×10!

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C. 9 × 9!

The place can filled by 9 way

Last places can be fill by 9! way

The total number of 9-digit numbers which have all different digits is

= 9.9!

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