Basic Math Examples

$74$ , $80$ , $74$ , $79$ , $83$ , $85$ , $80$ , $75$ , $73$ , $76$ , $82$ , $75$ , $77$ , $74$ , $78$ , $81$ , $79$

Step 1

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

$\frac{74 + 80 + 74 + 79 + 83 + 85 + 80 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2

Simplify the numerator.

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Step 2.1

Add $74$ and $80$ .

$\frac{154 + 74 + 79 + 83 + 85 + 80 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.2

Add $154$ and $74$ .

$\frac{228 + 79 + 83 + 85 + 80 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.3

Add $228$ and $79$ .

$\frac{307 + 83 + 85 + 80 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.4

Add $307$ and $83$ .

$\frac{390 + 85 + 80 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.5

Add $390$ and $85$ .

$\frac{475 + 80 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.6

Add $475$ and $80$ .

$\frac{555 + 75 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.7

Add $555$ and $75$ .

$\frac{630 + 73 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.8

Add $630$ and $73$ .

$\frac{703 + 76 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.9

Add $703$ and $76$ .

$\frac{779 + 82 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.10

Add $779$ and $82$ .

$\frac{861 + 75 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.11

Add $861$ and $75$ .

$\frac{936 + 77 + 74 + 78 + 81 + 79}{17}$

Step 2.12

Add $936$ and $77$ .

$\frac{1013 + 74 + 78 + 81 + 79}{17}$

Step 2.13

Add $1013$ and $74$ .

$\frac{1087 + 78 + 81 + 79}{17}$

Step 2.14

Add $1087$ and $78$ .

$\frac{1165 + 81 + 79}{17}$

Step 2.15

Add $1165$ and $81$ .

$\frac{1246 + 79}{17}$

Step 2.16

Add $1246$ and $79$ .

$\frac{1325}{17}$

Step 3

Divide.

$77.94117647$

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.

$77.9$