Algebra Examples

$11$ , $11$ , $12$ , $13$

Step 1

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

$\frac{11 + 11 + 12 + 13}{4}$

Step 2

Simplify the numerator.

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Step 2.1

Add $11$ and $11$ .

$\frac{22 + 12 + 13}{4}$

Step 2.2

Add $22$ and $12$ .

$\frac{34 + 13}{4}$

Step 2.3

Add $34$ and $13$ .

$\frac{47}{4}$

Step 3

Divide.

$11.75$

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.

$11.8$