So, You Must Convert To The Same Denominator. 6/10 Is The Same As 60/100. Now, Add. 60/100+15/100 = 85/100. Now Simplify. You Simplify To 17/20 meters high. I Hope This Helps!
The mean is like the average. you would add up all the numbers and divide by the amount of numbers there are. in this case, add them all up and divide by 6 because there are 6 different numbers. this will give you your answer
