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    3. The mean of seven numbers is 96. If an eight number is added, the mean become 112. Find the eight no
    The mean of seven numbers is 96. If an eight number is added, the mean become 112. Find the eight no

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    +1  Views: 680 Answers: 1 Posted: 10 years ago
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      1 Answer

      Homework?


      The 1st seven numbers have a sum = 7*96 = 672 points
      ----
      Let the eighth number be "x":
      ----
      Equation:

       

      672+x = 8*112


      x = 8*112 -672
      x = 224

       

      10 years ago. Rating: 6
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