Evaluate ¹²p⁵

A. 95,040
B. 248,832
C. 60
D. 792
Best answer

1 answer

To evaluate \( ¹²p⁵ \), we use the formula for permutations. The formula for permutations is given by:

\[ _nP_r = \frac{n!}{(n-r)!} \]

Where:

  • \( n \) is the total number of items,
  • \( r \) is the number of items to choose.

In this case, \( n = 12 \) and \( r = 5 \). Therefore, we need to calculate \( ¹²p⁵ \):

\[ ¹²p⁵ = \frac{12!}{(12-5)!} = \frac{12!}{7!} \]

Now, we can simplify \( \frac{12!}{7!} \):

\[ ¹²p⁵ = 12 \times 11 \times 10 \times 9 \times 8 \]

Calculating that step by step:

  1. \( 12 \times 11 = 132 \)
  2. \( 132 \times 10 = 1320 \)
  3. \( 1320 \times 9 = 11880 \)
  4. \( 11880 \times 8 = 95040 \)

Thus, \( ¹²p⁵ = 95040 \).

So the answer is:

A. 95,040