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 ...
109.4K viewsDec 15, 2019
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🔐 Can you find the unique 4-digit code? Use the clues carefully and eliminate the impossible digits first. Some numbers are correct but in the wrong position, while others are exactly where they belong. There is only ONE valid solution. Think you've cracked it? Drop your answer in the comments and explain your logic! 🧩👇 #BrainTeaser #CrackTheCode #LogicPuzzle #PuzzleChallenge #BrainSparkHub
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🔐 Can you find the unique 4-digit code? Use the clues carefully and eliminate the
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