Answer:
6,75
Explanation:
It's necessary the addition of all numbers, divided between the number of the numbers. It means: 8 +7 +5 +7 +4 +7 +6 +7 +8 +8 +8 +6 = 81, then we'll divide 81 between 12 (because there are 12 numbers), and the result is 6,75
Mean = ∑numbers/n numbers