A calculated "central" value of a set of numbers.

To calculate it: add up all the numbers, then divide by how many numbers there are.

Example: what is the average of 2, 7 and 9?

Add the numbers: 2 + 7 + 9 = 18

Divide by how many numbers (i.e. we added 3 numbers): 18 ÷ 3 = 6

So the average is **6**

(Also called the Arithmetic Mean.)

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