Civil Service Exam Reviewer · Ratio and Proportion · hard
The ratio of the number of pupils to teachers in a school is 50 : 1. If there are 14 teachers, how many pupils must be added so that the ratio becomes 60 : 1?
- 840
- 700
- 140
- 10
Answer
C. 140
Solution
Current pupils = 50 × 14 = 700. Needed = 60 × 14 = 840. Add 140.
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