A bag contains 10 marbles: 2 are green, 6 are red and 2 are blue. Chau choose a marble at random, and without putting it back chooses another at random. What is the probability that both marbles he chooses are green.
This is because the first time there are 2 green marbles and ten marbles total but the second time he had already taken out a green marble so there is only 1 green marble left and 9 marbles total. Hope this helps :)
