A popular website requires users to create a password consisting of digits only. If no digit may be repeated and each

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Source: Magoosh

A popular website requires users to create a password consisting of digits only. If no digit may be repeated and each password must be at least 9 digits long, how many passwords are possible?

A. 9! + 10!
B. 2 x 10!
C. 9! x 10!
D. 19!
E. 20!

The OA is B