What is the average number of books purchased for library A during 2004, 2005, 2007 and 2008

  • 465
  • 455
  • 460
  • 445
  • 450
  • Explanation:

    Required average  = 160+380+760+520/4

    =1820/4 = 455

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What is the average number of books purchased for library A during 2004, 2005, 2007 and 2008
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