# What is the average of 75 and 105?

Feb 14, 2017

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 = $\text{sum of all the values"/"the number of values}$

Average = $\frac{75 + 105}{2} = \frac{180}{2} = 90$

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.