Basic Math Examples

$84$ , $73$ , $84$ , $78$

Step 1

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

$\frac{84 + 73 + 84 + 78}{4}$

Step 2

Simplify the numerator.

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Step 2.1

Add $84$ and $73$ .

$\frac{157 + 84 + 78}{4}$

Step 2.2

Add $157$ and $84$ .

$\frac{241 + 78}{4}$

Step 2.3

Add $241$ and $78$ .

$\frac{319}{4}$

Step 3

Divide.

$79.75$

Step 4

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.

$79.8$