Mean of 12, 15, 9, 14

Step by step

The question

Question: find the mean of 12, 15, 9 and 14.

The mean is the fair share.

We add them all, then share the total equally.

1 Add them all

We add all the numbers, from left to right.

So the total is 50.

2 Count them

Now we count the numbers.

There are 4.

3 Share equally

We share the total equally: 50 divided by 4.

50 divided by 4 is 12.5.

4 Check

Let's check: if every number were 12.5, 4 of them would make 12.5 times 4.

That is 50, the total.

So it is right!

Let's look back.

First: add them all.

Then: count them.

Then: share equally.

Last: check.