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Permutations (with repetition)

TOP/Collection of Mathematical Formulas/Permutations and Combinations
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Calculates nΠr, the number of ordered selections of r items from n distinct items with repetition allowed.
Original number n
n≧r≧0
Number of items to select: r
Number of permutations nΠr  
\(\normalsize Permutations\ with\ repetition\\ (1)\ {}_n\Pi_r=n^r\\ \)

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Permutations (with repetition) | Keisan