First, you add them all together, and divide them by the number of quantities there are, so: 9+9+8+11+11+12+12+8= <span>80. Then you divide it by 8 (how many numbers there are) to get 10!</span>
If you are doing an estimate, then you need to look at the numbers to see kinda what they are around. This set of data seems to be revolving around the number 10 because there are 4 above and 4 below. So I would put down 10 for my answer.
Assessed Value = (Fair Market Value) x (0.40) Where 0.40 is the decimal equivalent of 40%. Tax Rate = $5.24/$100 of assessed value = $0.0524 per dollar of assessed value. Taxes = (Assessed Value) x (Tax Rate) = (Assessed Value) x ($0.0524) Hope this helps!