Basic Math Examples

$0$ , $72$ , $75$ , $75$ , $83$ , $83$ , $83$ , $91$

Step 1

The mean of a set of numbers is the sum divided by the number of terms.

$\frac{0 + 72 + 75 + 75 + 83 + 83 + 83 + 91}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add $0$ and $72$ .

$\frac{72 + 75 + 75 + 83 + 83 + 83 + 91}{8}$

Step 2.2

Add $72$ and $75$ .

$\frac{147 + 75 + 83 + 83 + 83 + 91}{8}$

Step 2.3

Add $147$ and $75$ .

$\frac{222 + 83 + 83 + 83 + 91}{8}$

Step 2.4

Add $222$ and $83$ .

$\frac{305 + 83 + 83 + 91}{8}$

Step 2.5

Add $305$ and $83$ .

$\frac{388 + 83 + 91}{8}$

Step 2.6

Add $388$ and $83$ .

$\frac{471 + 91}{8}$

Step 2.7

Add $471$ and $91$ .

$\frac{562}{8}$

Step 3

Cancel the common factor of $562$ and $8$ .

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Step 3.1

Factor $2$ out of $562$ .

$\frac{2 (281)}{8}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor $2$ out of $8$ .

$\frac{2 \cdot 281}{2 \cdot 4}$

Step 3.2.2

Cancel the common factor.

$\frac{2 \cdot 281}{2 \cdot 4}$

Step 3.2.3

Rewrite the expression.

$\frac{281}{4}$

Step 4

Divide.

$70.25$

Step 5

The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

$70.3$