Basic Math Examples

$68$ , $95$ , $72$ , $100$ , $82$ , $85$ , $72$ , $73$ , $68$ , $72$ , $80$

Step 1

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

$\frac{68 + 95 + 72 + 100 + 82 + 85 + 72 + 73 + 68 + 72 + 80}{11}$

Step 2

Simplify the numerator.

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Step 2.1

Add $68$ and $95$ .

$\frac{163 + 72 + 100 + 82 + 85 + 72 + 73 + 68 + 72 + 80}{11}$

Step 2.2

Add $163$ and $72$ .

$\frac{235 + 100 + 82 + 85 + 72 + 73 + 68 + 72 + 80}{11}$

Step 2.3

Add $235$ and $100$ .

$\frac{335 + 82 + 85 + 72 + 73 + 68 + 72 + 80}{11}$

Step 2.4

Add $335$ and $82$ .

$\frac{417 + 85 + 72 + 73 + 68 + 72 + 80}{11}$

Step 2.5

Add $417$ and $85$ .

$\frac{502 + 72 + 73 + 68 + 72 + 80}{11}$

Step 2.6

Add $502$ and $72$ .

$\frac{574 + 73 + 68 + 72 + 80}{11}$

Step 2.7

Add $574$ and $73$ .

$\frac{647 + 68 + 72 + 80}{11}$

Step 2.8

Add $647$ and $68$ .

$\frac{715 + 72 + 80}{11}$

Step 2.9

Add $715$ and $72$ .

$\frac{787 + 80}{11}$

Step 2.10

Add $787$ and $80$ .

$\frac{867}{11}$

Step 3

Divide.

$78.\overline{81}$

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.

$78.8$