Here is a quick tutorial and example on how to arrive at an average of 3 or more numbers.
It is simple enough to calculate: Add up all the numbers, then divide by how many numbers there are. This then becomes the sum divided by the count.
Example: What is the average of 3, 2, and 1. The Three Individual numbers add 3+2+1=6. 6 divided by three = 2.
The answer is “2”.