Suppose that a bag contains 43 red balls, 54 blue balls, and 72 green balls, and that

Question:

Suppose that a bag contains 43 red balls, 54 blue balls, and 72 green balls, and that 2 balls are chosen at random without replacement. Construct a probability tree for this problem. What is the probability that 2 green balls will be chosen? What is the probability that the 2 balls chosen will have different colors?