What is the average of 75 and 105?

1 Answer
Feb 14, 2017

Average (mean) = #90#


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.