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If a : b = 2 : 3 and b : c = 4 : 5, then a : c equals:

Competition practiceRatio, Percentage & Commercial Math
  • A8 : 15
  • B2 : 5
  • C8 : 12
  • D6 : 15

Step-by-Step Solution

Make b common: a : b = 8 : 12 and b : c = 12 : 15, so a : b : c = 8 : 12 : 15. Hence a : c = 8 : 15.
Answer: A) 8 : 15

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