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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

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Application +4 | -1

The 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

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Correct option: C

\frac{{n\left( {{n^r} - 1} \right)}}{{n - 1}}

Option C (\frac{{n\left( {{n^r} - 1} \right)}}{{n - 1}}) is correct because the total number of permutations is the sum of a geometric series.

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