Question

What is the average of 75 and 105?

Answer 1

Average (mean) = `90`

Explanation:

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 = `"sum of all the values"/"the number of values"`

Average = `(75+105)/2 = 180/2 = 90`

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.