Lesson: Applied Arithmetic - 14

Introducing Averages

[Page 14 of 36]
A number that represents the characteristics of a data set.
Average is found by adding up all of the numbers you have to find the mean of, and dividing by the number of numbers. So the mean of 3, 5, 7, 3 and 5 is 23/5 = 4.6.

Video Lesson - Explanation of Average

Averages, like ratios and rates, are variations of fractions.

The Average Formula:

Average =

So whenever you have 2 pieces of information, you can calculate the third.

For example:
The average of 3, 4 and 8 is 5, because .

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