What is the respective ratio between total number of books purchased for libraries A and B together in 2003 and total number of books purchased for the same libraries together in 2007

  • 22:31
  • 24:31
  • 11:17
  • 11:19
  • 22:35
  • Explanation:

    Required ratio = 640+240/760+480

    =880/1240

    =22:31

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What is the respective ratio between total number of books purchased for libraries A and B together
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