Finite Math Examples

$10$ , $12$ , $12$ , $13$ , $17$ , $19$ , $20$

Step 1

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

$\frac{10 + 12 + 12 + 13 + 17 + 19 + 20}{7}$

Step 2

Simplify the numerator.

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Step 2.1

Add $10$ and $12$ .

$\frac{22 + 12 + 13 + 17 + 19 + 20}{7}$

Step 2.2

Add $22$ and $12$ .

$\frac{34 + 13 + 17 + 19 + 20}{7}$

Step 2.3

Add $34$ and $13$ .

$\frac{47 + 17 + 19 + 20}{7}$

Step 2.4

Add $47$ and $17$ .

$\frac{64 + 19 + 20}{7}$

Step 2.5

Add $64$ and $19$ .

$\frac{83 + 20}{7}$

Step 2.6

Add $83$ and $20$ .

$\frac{103}{7}$

Step 3

Divide.

$14.71428571$

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.

$14.7$