20. Natalie also like smarties. She has a bag containing 3 red, 4 purple and 7 yellow. What is the probability that she can choose and eat two red and a purple in that order without looking?

21. A basketball coach claims that at the next game, the odds of her team winning are 3:1, the odds of losing is 5:1 and the odds of a tie are 1:11. Are these odds possible in any way? Explain your reasoning.