Answer:
65
Step-by-step explanation:
First add up all the numbers
65 + 64 + 65 + 70 + 68 + 61 + 65 + 66 + 62 + 64 = 650
Then divide the sum by the amount of numbers to find the average
There are 10 numbers so you divide by 10
650 / 10 = 65
so the average height is 65
