Basic Math Examples

$34.5$ , $40.5$ , $47$ , $55.9$ , $64.4$ , $71.2$ , $81.6$ , $81.9$ , $72.8$ , $59.8$ , $43.7$ , $35.9$

Step 1

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

$\frac{34.5 + 40.5 + 47 + 55.9 + 64.4 + 71.2 + 81.6 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2

Simplify the numerator.

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Step 2.1

Add $34.5$ and $40.5$ .

$\frac{75 + 47 + 55.9 + 64.4 + 71.2 + 81.6 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.2

Add $75$ and $47$ .

$\frac{122 + 55.9 + 64.4 + 71.2 + 81.6 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.3

Add $122$ and $55.9$ .

$\frac{177.9 + 64.4 + 71.2 + 81.6 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.4

Add $177.9$ and $64.4$ .

$\frac{242.3 + 71.2 + 81.6 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.5

Add $242.3$ and $71.2$ .

$\frac{313.5 + 81.6 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.6

Add $313.5$ and $81.6$ .

$\frac{395.1 + 81.9 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.7

Add $395.1$ and $81.9$ .

$\frac{477 + 72.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.8

Add $477$ and $72.8$ .

$\frac{549.8 + 59.8 + 43.7 + 35.9}{12}$

Step 2.9

Add $549.8$ and $59.8$ .

$\frac{609.6 + 43.7 + 35.9}{12}$

Step 2.10

Add $609.6$ and $43.7$ .

$\frac{653.3 + 35.9}{12}$

Step 2.11

Add $653.3$ and $35.9$ .

$\frac{689.2}{12}$

Step 3

Divide $689.2$ by $12$ .

$57.4\overline{3}$

Step 4

Divide.

$57.4\overline{3}$

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.

$57.4$