Question

A bag contains 4 green, 3 blue, and 5 yellow marbles. What is the probability of selecting a green marble, replacing it, then selecting a yellow marble?

Answer 1

5/36

Explanation:

• Total number in the universe = 4 + 3 + 5 = 12
• Probability of selecting a green (first time) = 4/12
• Probability of selecting a yellow (2nd time) = 5/12
• P(gr then yellow) = 4/12 * 5/12 = 20 / 144
• This reduces to 5/36