If a gum-ball machine contains 22 red gum balls, 46 yellow gum balls, 14
green gum balls, and 18 orange gum balls, what is the probability that a gum
ball chosen at random will be yellow?

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters