A bag contains yellow, green, blue, and white marbles in the ratio 4:2:3:8 . If the bag contains 187 marbles, then how many blue marbles are there?
Add all the ratios up:
[4 +2 + 3 + 8] =17
The blue marbles =[3 / 17] * 187 = 33 - Blue marbles in the bag.
+140 
