Mixture and Comparison Problems Practice Test

A paint store mixes white paint with blue paint to create a custom color. White paint costs $$25 per gallon and blue paint costs $$35 per gallon. If 12 gallons of the mixture costs $$28 per gallon, what percentage of the mixture by volume is white paint?

A tea merchant blends two types of tea. Type X costs $$12 per pound and Type Y costs $$18 per pound. If he wants to create 25 pounds of a blend that costs $$15 per pound, and then sell it at a 20% markup, what will be his profit per pound?