A phone number contains 7 digits. How many different numbers can be made using the digits 0–9 if the first digit is not 0 and none of the digits can be repeated?

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asked Jul 26, 2018 142k views

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A phone number contains 7 digits. How many different numbers can be made using the digits 0–9 if the first digit is not 0 and none of the digits can be repeated?

Mathematics
high-school

Minni asked

by Minni

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9658742 can be one!!!!!!!!!!!!!!

Saleem Khan answered Aug 1, 2018

by Saleem Khan

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