The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count. Example 1: What is the Mean of these numbers? 6, 11, 7. Add the numbers: 6 + 11 + 7 = 24. Divide by how many numbers (there are 3 numbers): 24 / 3 = 8. The Mean is 8.