Answer:
9
Step-by-step explanation:
the mean is the average so we would have to find the average of this set, to do that we add them all up and divide by the number of terms your added so 12+8+7+10+8+8+10=63 and since there are 7 terms you divide 63 by 7 so that means 63/7=9 so the mean is 9
