Question

A bag contains 4 blue marbles, 6 green marbles, and 2 red marbles. You select one green marble from the full bag. What is the probability that the next marble you select will be blue?

Answer 1

Well there are 12 marbles in total. If you select one green marble, you have 11 marbles in total. There are 4 blue marbles. So you have a 4/11 chance of selecting a blue marble or 36% probability of getting a blue marble.