hey,

i have the following question which i cannot answer.

Ten Students A,B,..... are in a class. A committee of three is chosen at random to represent the class.

Find the following probabilities:

a) A belongs to the committee

b) B belongs to the committee

c) A and B belong to the committee

d) A or C belong to the committee

I dont have a clue on how to approach this question.

The are 10_C_3 combinations of choosing the members, but is that necessary?

thanks in advance.