Question: A four-digit PIN is to be selected using the nine digits 0, 1,2,3,4,5,6,7,8. How many 4-digit PINs are possible

A four-digit PIN is to be selected using the nine
A four-digit PIN is to be selected using the nine digits 0, 1,2,3,4,5,6,7,8. How many 4-digit PINs are possible

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