Question: A small combination lock on a suitcase has 4 wheels, each labeled with the 10 digits 0 to 9. How many 4 digit combinations are

A small combination lock on a suitcase has 4 wheels, each labeled with the 10 digits 0 to 9. How many 4 digit combinations are possible if no digit is repeated? If digits can be repeated? If successive digits must be different? a. The number of different 4 digit combinations possible if no digit is repeated is D

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