let's say that for each ounce of 5-cent rice, you buy k ounces of 6-cent rice.
7(1+k) = (5+6k)(6/5)
k = 5
You bought two varieties of rice, costing 5 cents per ounce
and 6 cents per ounce each, and mixed them in some ratio. You then
sold the mixture at 7 cents per ounce, making a profit of 20 percent.
What was the ratio of the mixture?
1 answer