13. A bag contains 5 red marbles, 3 blue marbles, and 4 yellow marbles. A students removes 1 marble without looking, records the colour, then returns the marble to the bag. The process is repeated. What is the probability of NOT a red marble, then NOT a yellow marble?

Answer 1

12 marbles. 7 not red, 8 not yellow. So,
7/12 * 8/12