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Permutation Formula
The number of arrangements of n distinct objects taken r at a time is:
$${}^nP_r=\frac{n!}{(n-r)!}$$
Usage
- Used when order matters in selecting objects.
The number of arrangements of n distinct objects taken r at a time is:
$${}^nP_r=\frac{n!}{(n-r)!}$$
Usage
- Used when order matters in selecting objects.
