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Relation Between Permutation and Combination
## Formula
$$^nP_r=^nC_r\cdot r!$$
Therefore:
$$^nC_r=\frac{^nP_r}{r!}$$
## Usage
- Used to convert between arrangements and selections.
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Relation Between Permutation and Combination
## Formula
$$^nP_r=^nC_r\cdot r!$$
Therefore:
$$^nC_r=\frac{^nP_r}{r!}$$
## Usage
- Used to convert between arrangements and selections.
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