In a survey of 500 people, 40% own a car. Of the car owners, 20% drive to work. How many people in the survey are car owners who drive to work?
Answer and explanation
Correct answer: D. 40
- Step 1: Car owners .
- Step 2: Of those, drive to work: .
Answer
40.
Why not the others: 200: that is the number of car owners. 300: the two percentages are added or subtracted. 100: the second percentage is applied to everyone.
Practise more Percentages and Ratios.
Free questions with an explanation for every one, and full timed Civil Service Recruitment: CRE and Basic Law Test (Hong Kong) mock tests.