Mean of 85, 90, 78, 92, 80

Step by step

The question

Question: find the mean of 85, 90, 78, 92 and 80.

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 425.

2 Count them

Now we count the numbers.

There are 5.

3 Share equally

We share the total equally: 425 divided by 5.

425 divided by 5 is 85.

4 Check

Let's check: if every number were 85, 5 of them would make 85 times 5.

That is 425, the total.

So it is right!

Let's look back.

First: add them all.

Then: count them.

Then: share equally.

Last: check.