A bag contains 4 red marbles and 6 blue marbles. Brandon selects one marble from the bag. Without replacing the marble he then selects a second marble. What is the probability that he first selects a blue marble and then selects a red marble?

Question

anonymous · Answer

blue marble first time: 6 blue marbles/10total marbles = 3/5
red marble second time: 4 red marbles/9total marbles = 4/9
Total probability = multiple both probabilities = 4/15