A bag contains yellow, green, blue, and white marbles. The ratio of yellow, green, blue, and white marbles is 1:2:3:4. If the bag contains 180 marbles, then how many blue marbles are there?
+12 Add up the yellow, green, blue, and white marbles. You will get 10. Divide 180 by 10 and you get 18. There are 3 blue marbles for every 10 total marbles. Multiple 3 and 18 and you will get 54!
