Mathematics, 16.04.2021 02:50 monsterwins292

A combination lock has a 4 digit code using the digits 0 - 9. How many different codes can be made if you can't repeat numbers?
codes
How many different codes can be made if you can repeat numbers?
codes

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A combination lock has a 4 digit code using the digits 0 - 9. How many different codes can be made...