Julio has a bag containing 7 red marbles, 8 blue marbles, 3 green marbles and 9 yellow marbles . He randomly draws 3 red marbles, 1 blue marble, and 2 yellow marbles from the bag. What is the probability that the next marble he draws is green?
Find the total number of marbles: 7 + 8 + 3 + 9 = 27 Find the total after some marbles have been taken out: 3 + 1 + 2 = 6 27 - 6 = 21. There are 3 green marbles left in the bag. There are a total of 21 marbles in the bag. The answer is 3/21.
