Problem-Solving and Data AnalysisMediumScaling a mixture
Problem-Solving and Data Analysis practice question
A paint mixture uses 3 parts blue to 4 parts white. How many millilitres of blue are needed to go with 200 millilitres of white?
Answer: 150
3/4 × 200 = 150.
Common wrong answers
- If you answered 175
- 175 subtracts 25 from 200 without reason.
- If you answered 600
- 600 multiplies 200 by 3.
- If you answered 266.67
- 266.67 inverts the ratio.
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