Mean of 10, 20, 30, 40, 50

Step by step

The question

Question: find the mean of 10, 20, 30, 40 and 50.

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 150.

2 Count them

Now we count the numbers.

There are 5.

3 Share equally

We share the total equally: 150 divided by 5.

150 divided by 5 is 30.

4 Check

Let's check: if every number were 30, 5 of them would make 30 times 5.

That is 150, the total.

So it is right!

Let's look back.

First: add them all.

Then: count them.

Then: share equally.

Last: check.