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Australian AMC 2012 - Intermediate Question 20

AMC AUSTRALIA · Australian AMC 2012 - Intermediate

Question 20

Pippa made a litre of drink from apple juice and water in the ratio of 1 : 2. She found the taste too strong so she made a litre again in the ratio 1 : 3, but found this too weak. So she thought if she combined these two mixtures, it should be about right. What is the ratio of apple juice to water in this new mixture?
  1. 2 : 5
  2. 2 : 7
  3. 5 : 12
  4. 7 : 17
  5. 7 : 24