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In a mixture of two liquids, if the first liquid is 20% alcohol and the second i

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Question: In a mixture of two liquids, if the first liquid is 20% alcohol and the second is 50% alcohol, what is the overall percentage of alcohol in the mixture if equal volumes of both liquids are mixed?

Options:

  1. 35%
  2. 40%
  3. 45%
  4. 50%

Correct Answer: 35%

Solution: 

Average percentage = (20% + 50%) / 2 = 35%.

In a mixture of two liquids, if the first liquid is 20% alcohol and the second i

Practice Questions

Q1
In a mixture of two liquids, if the first liquid is 20% alcohol and the second is 50% alcohol, what is the overall percentage of alcohol in the mixture if equal volumes of both liquids are mixed?
  1. 35%
  2. 40%
  3. 45%
  4. 50%

Questions & Step-by-Step Solutions

In a mixture of two liquids, if the first liquid is 20% alcohol and the second is 50% alcohol, what is the overall percentage of alcohol in the mixture if equal volumes of both liquids are mixed?
  • Step 1: Identify the percentage of alcohol in the first liquid, which is 20%.
  • Step 2: Identify the percentage of alcohol in the second liquid, which is 50%.
  • Step 3: Since we are mixing equal volumes of both liquids, we can find the average percentage of alcohol.
  • Step 4: Add the two percentages together: 20% + 50% = 70%.
  • Step 5: Divide the total by 2 to find the average: 70% / 2 = 35%.
  • Step 6: The overall percentage of alcohol in the mixture is 35%.
  • Mixture and Concentration – Understanding how to calculate the overall concentration of a mixture based on the concentrations of its components.
  • Weighted Average – Recognizing that when mixing different concentrations, the average must account for the volume of each component.
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