Answer:
5cm
Step-by-step explanation:
I need a picture or something to answer this question
Average = Mean
To find the mean, add up the numbers and divide it by how many numbers there are.
So,

There are 5 numbers in total.

To do these types of division, ignore the decimal and add a 0 at the end.
So we can do:

And put back the decimal.
Hope this helps :)
The correct answer to this question is.....
A!!!
I hope this helped!!! (I took the test on it)