Number of 4-Digit Codes With and Without Repetition | Combinatorics, Permutations
8:56
YouTubeWrath of Math
Number of 4-Digit Codes With and Without Repetition | Combinatorics, Permutations
How many 4 digit codes can be made using the digits 0 through 9? It depends on whether or not we allow repetition, or if we enforce any other weird rules. In today's video combinatorics lesson we'll figure out how many 4 digit codes we can make with and without repetition! Lesson on the permutation formula and why it works: https://www.youtube ...
108.6K viewsDec 15, 2019
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