# Mean

The mean is the most commonly used measure of . To calculate the mean, add the values together and divide the total by the number of values.

### Example

Question

Five friends compare their marks in a French test. See the table below:

NameMark
Shabana${41}$
Bea${54}$
Liam${79}$
Dave${26}$
Ed${65}$

What is the mean mark?

Mean $$=(41 + 54 + 79 + 26 + 65) \div 5$$

$= 265 \div 5$

$= 53$

Notice that the mean does not have to be any of the given data values.

A die is thrown $$10$$ times. These are the results:
$3,~5,~1,~2,~6,~4,~2,~5,~6,~1$
Mean $$= (3 + 5 + 1 + 2 + 6 + 4 + 2 + 5 + 6 + 1) \div 10$$
$35 \div 10 = 3.5$