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The average calculator calculates the average of a set of numbers between two and eight.

The average calculator will calculator the mean of up to eight numbers. An interesting aspect of the calculator is you can see the change in the mean as more values are entered. Before we use the calculator, we should know how to calculate the average. Note that the mean is the same as average and can be used interchangeably.

The average of a set of numbers is simply the sum of the numbers divided by the total number of values in the set. For example, suppose we want the average of `24`

,`55`

, `17`

, `87`

and `100`

. Simply get the sum of the numbers `24 + 55 + 17 + 87 + 100 = 283`

and divide by `5`

to get `56.6`

. A simple problem as such can be done by hand as well, but more complex numbers involving many decimal places are more conveniently solved using the calculator. Note that the mean rating calculator does a similar math - it calculates an average rating given the number of votes with values from 1 to 5.

The weighted average calculator lets you assign weights to each number to make it less or more important. A common type of a weighted mean to compute is a grade point average (GPA). This is how you do it by hand:

- Multiply the value of the letter grade by the number of credits in the class.
- Do this for all the classes and take the sum.
- Divide the sum by the total number of credits.

Suppose the grades are A for a `3`

credit class, two B's for the `4`

credit classes and a C for a `2`

credit class. Using the standard value of `4`

for an A, `3`

for a B and `2`

for a C, the grade point average is `GPA = [4(3) + 3(4) + 3(4) + 2(2)]/(3 + 4 + 4 + 2) = 40/13 = 3.08`

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