the three numbers add up 9 + 10 + 8 = 27
then divide by that three so
27 / 3 = 9
making 9 the average.
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10
6 + 10 + 8 + 7 + 9= 40----------you have 5 integers, so......40/5= 8=====the arithmetic average, or the mean of these numbers
If you mean: 8 9 10 11 and 12 then the average mean is 10
Sample size: 12 Sorted sample: 3, 5, 6, 6, 7, 7, 8, 9, 9, 9, 10, 10 Middle numbers: 7, 8 Average of middle numbers, known as median: 7.5
average is 9 so 8, 9 & 10