Respuesta :

Answer:

A. [tex]\frac{n!}{(n-r!)r!}[/tex]

Step-by-step explanation:

The formula for combinations is: [tex]\frac{n!}{(n-r!)r!}[/tex].

The formula for permutations is: [tex]\frac{n!}{(n-r!)}[/tex]

So, the correct answer is A.

0757183
The answer is A. n!/r(n-r)!