The average is 6.
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The average of 7, 8, 9, and 4 is 7.
The average of 8 and 4 would be 6 (8+4)/2=6
Add the numbers and divide by the number of numbers. So, average = (-4 + 8 )/2 = +4/2 = 2
Average = Sum.Count = (6+9+7+10)/4 = 32/4 = 8 cm.
5 8 + 5 + 3 + 4 = 20 then as there are four numbers divide 20 by that 4 to give answer of 5