Weighted Averages: Word Problems

Question

 Two friends are making lemonade to sell at their lemonade stand. First, they make 1 gallon of lemonade containing 23% lemon juice, but that doesn't taste quite right to them. They decide to add some store-bought lemonade that is 33% lemon juice until they have a mixture that is 28% lemon juice. How much of the store-bought lemonade should they add?

 

Write your answer as a whole number or as a decimal rounded to the nearest tenth.

Answer 1

They have added 1 gallon of 33% lemon juice, to their original 1 gallon 23% home-made lemon juice and got 2 gallons of 28% lemon juice.