3 times 103 1000 permutations. A permutation with repetition of n chosen elements is also known as an n -tuple. A formula for permutations Using the factorial we can rewrite 𝑃𝑛𝑘𝑛𝑛1 𝑛2𝑛𝑘1 as 𝑃𝑛𝑘 𝑛.
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In the lock above there are 10 numbers to choose from 0123456789 and we choose 3 of them. Combinations and Permutations Calculator Find out how many different ways to choose items. R times nr. We have already covered this in a previous video.