A Permutation
Calculate the permutation: 5P2
Expand Hint
The number of different permutations of "n" distinct objects taken "r" at a time is:
$$$P_{(n,r)}=\frac{n!}{(n-r)!}$$$
Hint 2
Permutation format:
$$nPr$$
The number of different permutations of "n" distinct objects taken "r" at a time is:
$$$P_{(n,r)}=\frac{n!}{(n-r)!}$$$
Solving the permutation:
$$$P_{(5,2)}=\frac{5!}{(5-2)!}=\frac{5!}{3!}=\frac{5\cdot 4\cdot 3!}{3!}=20$$$
20
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