Question

There are 5 yellow marbles, 1 purple marble, 3 green marbles, and 3 red marbles in a bag. Once a marble is drawn, it is replaced. Find the probability. P(not red then yellow)

(Hint: If there are 3 red marbles and 12 total how many marbles are not red? Also, make sure to SIMPLIFY your answer)

Answer 1

5/16.

Explanation:

There are 12 marbles in the bag, 3 are red and 5 are yellow).

P(not red) = (12/3)/12 = 9/12 = 3/4.

P(yellow) = 5/12.

P(not red then yellow) = 3/4 * 5/12

= 15/48

= 5/16.