Section: Arithmetic Reasoning

13) A paint company mixes it's paint with water to create more paint per gallon. They currently have ten gallon jugs which contain 10% water. How much water must they add to create a 80/20 mix of paint to water?

1. 1 gallon
2. 1.25 gallons
3. 1.5 gallons
4. 1.75 gallons
5. 2 gallons

Currently the mixture is 90% paint, 10% water or 9 gallons of paint for every 1 gallon of water.

For the company to create an 80% / 20% mix, the company must add 1.25 gallons to their current 10 gallon mixtures. This will create 2.25 gallons of water for every 11.25 total gallons. This results in a ^2.25/_11.25 or 20% water mix.