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welcome to math with mr. J in this video

we're going to discuss how to find or

calculate an average and the average is

a number that represents the typical or

central value for a data set now you see

that there are two lists of numbers or

data sets on your screen to the left we

have number one and to the right we have

number two so we're going to go through

and discuss how to find the average for

those two at the top of your screen in

blue you'll see the steps we're going to

take in order to calculate the average

we're going to add up all the numbers

and then divide by how many numbers

there were in that data set or list of

numbers so let's jump right in to number

one so for number one on our list of

numbers starts with an 8 and we actually

have a list of nine numbers there so the

first thing we need to do is add up all

nine of those numbers and once we do

that we get a sum or answer of 72 so we

again we added up all nine of those

numbers once we add them up we divide by

how many numbers are in that list or

data set and we have 1 2 3 4 5 6 7 8 9

so we do 72 divided by 9 and that gives

us an average of 8 now it worked out to

be a whole number

you will also get decimals when

calculating averages so let's take a

look at number 2 so we have an 80 75 96

80 to 90 187 and a 70 so the first thing

we need to do is add up all of those

numbers and we get a sum of 581 now we

need to

five by how many numbers there are one

two three four five six seven so 581

divided by seven will give us the

average and this one actually turns out

to be another whole number 83 again when

you're calculating averages you will get

decimals that's okay

so that's how you find or calculate an

average add up all of the numbers and

then divide by how many numbers there

were thanks so much for watching

until next time peace