The pharmacist's milkweed concoction didn't work (see practice problem E). It only gave the queen split ends.
However, the queen, in a rare kind-hearted moment, agreed to let the pharmacist try again. This time he has decided to combine a mixture containing 50% sorghum with a mixture containing 75% sorghum to create a 10 ounce mixture containing 60% sorghum.
How many ounces of the 50% mixture should the pharmacist use?