Basic Math Examples

$29$ , $97$ , $56$ , $63$ , $72$ , $74$ , $88$ , $69$ , $68$ , $56$ , $98$ , $61$ , $75$ , $84$ , $89$

Step 1

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

$\frac{29 + 97 + 56 + 63 + 72 + 74 + 88 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2

Simplify the numerator.

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Step 2.1

Add $29$ and $97$ .

$\frac{126 + 56 + 63 + 72 + 74 + 88 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.2

Add $126$ and $56$ .

$\frac{182 + 63 + 72 + 74 + 88 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.3

Add $182$ and $63$ .

$\frac{245 + 72 + 74 + 88 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.4

Add $245$ and $72$ .

$\frac{317 + 74 + 88 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.5

Add $317$ and $74$ .

$\frac{391 + 88 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.6

Add $391$ and $88$ .

$\frac{479 + 69 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.7

Add $479$ and $69$ .

$\frac{548 + 68 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.8

Add $548$ and $68$ .

$\frac{616 + 56 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.9

Add $616$ and $56$ .

$\frac{672 + 98 + 61 + 75 + 84 + 89}{15}$

Step 2.10

Add $672$ and $98$ .

$\frac{770 + 61 + 75 + 84 + 89}{15}$

Step 2.11

Add $770$ and $61$ .

$\frac{831 + 75 + 84 + 89}{15}$

Step 2.12

Add $831$ and $75$ .

$\frac{906 + 84 + 89}{15}$

Step 2.13

Add $906$ and $84$ .

$\frac{990 + 89}{15}$

Step 2.14

Add $990$ and $89$ .

$\frac{1079}{15}$

Step 3

Divide.

$71.9\overline{3}$

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.

$71.9$