I need help with these 2 questions.

1. At the end of each week, an employer gives some vacation hours to a few randomly selected employees. There are 25 employees in her department11 males and 14 females. The employer wants to give vacation hours to 6 of the employees. Is this a permutation or a combination?
2. How many possible groups of 6 employees can she choose?

25! / 19!

25! / 6!

25! / (19!)(6!)

25! / (20!)(5!)