Problem-Solving and Data AnalysisVery hardPercent of a percent of a total
Problem-Solving and Data Analysis practice question
In a survey of 1,200 people, 45% were under 30 years old, and 40% of those under 30 said they own a bicycle. How many of the people surveyed were under 30 and own a bicycle?
Answer: 216
0.45 × 1,200 = 540 people under 30; 0.40 × 540 = 216.
Common wrong answers
- If you answered 480
- 480 is 40% of everyone, not of those under 30.
- If you answered 540
- 540 is the number under 30.
- If you answered 1020
- 1,020 is 85% of 1,200, adding the percentages.
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