A box of 15 chocolates has 6 that are caramel, 5 that contain nuts, and 4 that are nougat. If you randomly select 3 chocolates, what is the probability that you will get all nuts?

An undergraduate research committee consisting of 4 people is to be formed form 12 doctoral students and 4 supervisors. Find the probability that the committee will consist of exactly 2 doctoral students.

There are 3 bags. The first bag contains 3 red and 7 black balls. The second bag contains 8 red and 2 black balls. The third bag contains 4 red and 6 black balls. One bag is selected randomly and a ball is drawn from it. If the drawn ball is red, the probability that it was drawn from the third bag is

Kim has a bag of 10 white marbles and 15 black marbles. What is the probability that she will choose to marbles that are both the same colour without replacement 

A jar contains 2 red marbles, 8 green marbles, and 5 blue marbles. What is the probability that you draw 3 green marbles in a row if you do replace the marbles after each draw? =  What is the probability that you draw 6 blue marbles in a row if you don't replace the marbles after each draw?

A jar contains 2 red marbles, 9 green marbles, and 8 blue marbles. what is the probability that you draw 5 green marbles in a row if you DO replace the marbles after each draw?