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In a class of 40 students, 15 come to school by bus and the rest walk. What is the ratio of the students who walk to the total number of students?

Class 6Ratio and ProportionRatio and Proportion
  • A5 : 3
  • B5 : 8
  • C3 : 8
  • D8 : 5

Step-by-Step Solution

Students who walk = 40 - 15 = 25. Walkers : total = 25 : 40 = 5 : 8 (HCF 5). The option 5 : 3 is walkers : bus riders (25 : 15), a part-to-part ratio, and 3 : 8 is bus riders : total. Only 5 : 8 compares the walkers with the whole class.
Answer: B) 5 : 8

Key idea: What a ratio means

The ratio 2 : 3 says: for every 2 of one thing, there are 3 of another. In a fruit basket of 2 apples and 3 oranges, the ratio of apples to oranges is 2 : 3. **Order matters** — the ratio of oranges to apples in the same basket is 3 : 2. The two quantities must be in the same unit (you can't ratio apples to kilograms unless you convert).

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