25) One canned juice drink is 15% orange juice; another is 5% orange juice. How many liters of each should be mixed together in order to get 10L that is 12% orange juice.
Let A be the 15% canned juice and B be 5% juice Va + Vb = 10 Vb = 10 - Va Concentration of final solution = 12% juice 10 x 0.12 = Va x 0.15 + Vb x 0.05 Substituting Vb from the first equation:
