Question

A bag contains 3 red, 4 blue, 3 green, and 5 yellow marbles. What is the probability of

picking two green marbles in a row, without replacing the first marble?

Answer 1

1/35 ≈2,85%

Explanation:

Total possible outcomes for the first pick: 3+4+3+5 = 15

Probability of picking a green marble for the first pick : 3/15 = 1/5

Total possible outcomes for the second pick: 15-1(the first pick) = 14

Probability of picking a green marble for the second pick : 3-1(first pick)/14 = 2/14 = 1/7

Probability of picking green marble 2 times in a row = 1/5 * 1/7 = 1/35 ≈2,85%

Hope this help you :3