How to Find the Mean

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Find the mean of a series of numbers by adding all of the numbers together and dividing by the amount of numbers in the series. Learn how the average of numbers is the same as the mean with information from a math teacher in this free video math lesson.

Part of the Video Series: Math Problems & History
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Video Transcript

So how do you find the mean? Hi, I'm Jimmy, I've been teaching college math for 9 years and if you've been finding averages and you've been pretty good at it, then that's exactly what finding the mean is because the mean by definition is the average of the numbers that you have. So basically we're just going to reinforce the idea of finding the averages today and here are some 5 numbers that will help us find this particular mean. Now keep in mind because there are 5 numbers, the number 5 is something that you're going to have to keep in mind before you find the mean. Now first and foremost, with these 5 numbers you need to add them together. So 6 plus 7 is 13. 13 plus 4 is 17. 17 plus 1 is 18 and 18 plus 2 is 20. So right off the bat, you need to take into account that all 5 of these numbers give you 20. Now where you go from there is again, remember the fact that there's 5 numbers there and what you have is essence becomes a division problem after that because you're going to take the 20 that you just found and then you're going to divide by the number of figures that you see up here which is 5 and luckily for us, 5 going into 20 is 4. Now what that tells you here is that the average, the mean, is 4. So as long as you know how many figures you have and as long as you know how to add all the numbers together, you can do the division just as easily. So I'm Jimmy and this has been how to find the mean.


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