What value is a permutation of n things taken r at a time divided by to get the combination of n things taken r at a time? A. r!
B. (n-r)!
C. r

A. r!

Step-by-step explanation:

Combinations formula:

is the number of different combinations of x objects from a set of n elements, given by the following formula.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

Permutation of n things taken r at a time

Combination of n things taken r at a time:

Division:

So the correct answer is:

A. r!

it should be a and d. lmk if i'm wrong xd