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Question
A typist has to type a manuscript of 40 pages. She has typed 30 pages of the manuscript. What is the ratio of the number of pages typed to the number of pages left?
Solution
Total number of pages = 40
Number of pages typed = 30
The number of pages left = 40 – 30 = 10
∴ The required ratio = `"Number of pages typed"/"Number of pages left"`
= `30/10 = 3/1` = 3:1
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