The average is 10.
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10.8
To find the average of a set of numbers, you add all the numbers together and then divide by the total number of values. In this case, the sum of 8, 9, 10, 11, and 12 is 50. To find the average, you divide 50 by the total number of values, which is 5. Therefore, the average of 8, 9, 10, 11, and 12 is 10.
7 + 8 + 10 + 11 = 36 / 4 = 9
It is (8+6+11+12+13)/5 = 10
11