Questions: Find the value of the permutation.
3 P2
3 P2 = (Type a whole number.)
Transcript text: Find the value of the permutation.
\[
{ }_{3} P_{2}
\]
${ }_{3} P_{2}=$ $\square$ (Type a whole number.)
Solution
Solution Steps
To find the value of the permutation \({ }_{3} P_{2}\), we use the formula for permutations, which is given by \({ }_{n} P_{r} = \frac{n!}{(n-r)!}\). Here, \(n = 3\) and \(r = 2\). We will calculate the factorial of 3 and the factorial of \(3-2\), and then divide the two results to find the permutation value.
Step 1: Define the Permutation Formula
To find the value of the permutation \({ }_{3} P_{2}\), we use the formula for permutations:
\[
{ }_{n} P_{r} = \frac{n!}{(n-r)!}
\]
where \(n = 3\) and \(r = 2\).
Step 2: Calculate Factorials
We need to calculate \(3!\) and \((3-2)!\):
\[
3! = 3 \times 2 \times 1 = 6
\]
\[
(3-2)! = 1! = 1
\]
Step 3: Compute the Permutation
Now, substituting the factorial values into the permutation formula:
\[
{ }_{3} P_{2} = \frac{3!}{(3-2)!} = \frac{6}{1} = 6
\]