Problem-Solving and Data AnalysisVery hardConcentration of a mixed drink
Problem-Solving and Data Analysis practice question
Three litres of a drink that is 10% fruit juice are mixed with 2 litres of a drink that is 25% fruit juice. What percent of the mixture is fruit juice?
Answer: 16
Juice: 0.3 + 0.5 = 0.8 litres in 5 litres, which is 16%.
Common wrong answers
- If you answered 35
- 35 adds the two percentages.
- If you answered 17.5
- 17.5 averages 10 and 25, ignoring the volumes.
- If you answered 0.8
- 0.8 is the litres of juice, not the percent.
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