3. There are 4 blue and 6 green balls in a bag. A ball is selected at random without replacement. A second ball is then selected at random. a) Draw a tree diagram to represent all of the possible outcomes. b) What is the probability of two blue balls being selected? Give your answer to 3 d.p. c) What is the probability that 1 blue and 1 green ball are selected, in any order? Give your answer to 3 d.p.