80 + 90 + 100 + 110 = 380/4 = 95
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70 80 80 80 90 90 100 100 110 110 120 130 160Mode = 80
70 80 80 80 90 90 100 100 110 110 120 130 160Range = 160 - 70 = 90
30 + 80 = 110
The result of the equation - 20 plus 90 plus 60 plus 80, is found as follows; 20 + 90 + 60 + 80 = ( 20 + 90 ) + 60 + 80 = 110 + ( 60 + 80 ) = 110 + 140 = 250 Answer = 250
From 80 to 110