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Two numbers are in the ratio 3 : 7. If 4 is subtracted from each, the ratio becomes 1 : 3. What is the smaller number?

Competition practiceRatio, Proportion & Mixtures
  • A12
  • B28
  • C8
  • D16

Step-by-Step Solution

Let them be and gives , so . The smaller number is 12.
Answer: A) 12

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