This problem seemed so simple in the beginning, but now, I am completely confused. I don't even know where to start. Is it just me?

4. In a class of 25 students, there are 13 boys and 12 girls. A committee of 3 students is needed and is to be chosen randomly from the group of 25.a. What is the probability of the group will have 2 boys and 1 girl?b. What is the probability of the group having all boys or all girls?