Answer:
5
Step-by-step explanation:
Hello There!
The mean is pretty much the average
So to find the mean we first add up all of the values
2+3+6+6+7+8+8=40
Then we count the amount of points 
There are 8 points
our final step is to divide the total value by the total number of points
40/8=5
so the mean (average) would be 5
 
        
                    
             
        
        
        
It is irrational because it is a decimal that doesn't terminate or repeat! :)
        
             
        
        
        
The answer is: 10.
Explanation: The numbers are in order by the median/lowest to highest so in that case X wouldn't be 7 because the X would have been next to the 7 not on the other side of the 10.