Multiple choice

Joseph bought two varieties of rice, costing 5 cents per ounce and 6 cents per ounce each, and mixed them in some ratio. Then he sold the mixture at 7 cents per ounce, making a profit of 20 percent. What was the ratio of the mixture?

  1. 1:10

  2. 1:5

  3. 2:7

  4. 3:8

  5. 5:7

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Selling price is 7 cents/oz with 20% profit, so cost price = 7 / 1.2 = 5.833 cents/oz. Using alligation: (6 - 5.833) / (5.833 - 5) = 0.167 / 0.833 = 1/5.