Need help with math exam question
Question asked by: chrisowen
Asked on: 21 Jan 2011
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Date of comment: Fri, Jan 28th 2011
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Next question: Single copies of a book cost Rs.16 each, but purchasers of 20 or more books pay only Rs.13 per book. What is the value of n<20 for which one could buy 20 books at a lower total cost than one could buy exactly "n" books?
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