A pineapple drink contains 15% pineapple juice. How much pure pineapple juice should be added to 8 quarts of the drink to obtain a mixture containing 50% pineapple juice?

A pineapple drink contains 15 pineapple juice How much pure pineapple juice should be added to 8 quarts of the drink to obtain a mixture containing 50 pineapple class=