Mathematics, 01.01.2022 08:10, tristina20

How many different 4-digit personal identification numbers are possible if no digit can be used twice? a. 1,000 b. 5,040 c. 9,000 d. 10,000 Please select the best answer from the choices provided A B C D.

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How many different 4-digit personal identification numbers are possible if no digit can be used twic...