Multiple choice

One type of liquid contains 16% of milk, the other con­tains 4% of milk in a can filled with 3 parts of the first liquid and 6 parts of the second liquid. Find the percentage of milk in the new mixture.

  1. 9%

  2. 8%

  3. 6%

  4. 10%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Weighted average: (3 parts * 16% + 6 parts * 4%) / (3 + 6) = (48 + 24) / 9 = 72 / 9 = 8%.

AI explanation

Using the weighted average method, multiply the parts by their respective milk percentages: (3 * 16) + (6 * 4) = 48 + 24 = 72. The total number of parts in the new mixture is 3 + 6 = 9. Divide the total milk percentage value by the total parts to get 72 / 9 = 8%. The resulting percentage of milk is 8%.

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