Answers

2016-04-07T14:52:09+05:30
Mean is equivalent to sun of given quantity over no. Of quantity 77x+7x+5x+3x+x-2 /5=93x-2/5
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2016-04-07T14:53:23+05:30
Mean = sum of observation 
              no. of observation
          = 77x + 7x + 5x + 3x + x-2
                             5
          = 93 x - 2
                  5
              
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