The total number of nine digit number of different digits
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2
Answer:
First digit from the left can be filled in 9 ways (excluding '0'). Now nine digits are left including 'O'. So remaining eight places can be filled with these nine digits in 9PS ways. So, total number of numbers = 9 x 9P8 = 9×9!
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0
Answer:
Number digits will be 9 only,it wont change if there are different digits.
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