Class 11MathematicsPermutations and CombinationsDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
MediumThe total number of permutations of $n (> 1)$ different things taken not more than $r$ at a time,when each thing may be repeated any number of times is
- A$\frac{n(n^n-1)}{n-1}$
- B$\frac{n^r-1}{n-1}$
- C$\frac{n(n^r-1)}{n-1}$
- DNone of these
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