QUESTION 1]: To make a committee 4 men are to be chosen out of 6 candidates. What is the probability that certain two men will serve on that committee?

Folks, I don't need the answer. I'm learning Probability thus I need to think about it. I just need a hint.

I already have solved another problem similar to this. I'm not sure if it's correct or not.

It is:

QUESTION 2]: A committee of 3 must be chosen from 8 candidates. What is the probability that certain three people will be selected.

MY SOLUTION: I consider that 3 certain people a group. therefore we have 5+1 groups (5 individuals and 1 group of those certain people)

The result will be : C(1,6)/C(3,8)

Is this correct? If not, then I definitely can't solve QUESTION 1

Thank you in advance for your help