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.

$77.9$