What is the average of 75 and 105?
Average (mean) =
There are 3 different types of "average" - but I assume this refers to the "mean".
To find an average (or the mean) of two numbers, add them together and divide by 2.
In general, Mean =
From this we can see that:
One value is above and one is below the average.
They differ from the mean by the same amount so that the mean is exactly between them.