Basic Math Examples

$7.8$ , $5.5$ , $9.5$ , $5.2$ , $1$ $6$ , $1.4$ , $7.5$ , $6.9$ , $8.7$ , $5.7$ , $2.2$

Step 1

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

$\frac{7.8 + 5.5 + 9.5 + 5.2 + 1 + 6 + 1.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2

Simplify the numerator.

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Step 2.1

Add $7.8$ and $5.5$ .

$\frac{13.3 + 9.5 + 5.2 + 1 + 6 + 1.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.2

Add $13.3$ and $9.5$ .

$\frac{22.8 + 5.2 + 1 + 6 + 1.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.3

Add $22.8$ and $5.2$ .

$\frac{28 + 1 + 6 + 1.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.4

Add $28$ and $1$ .

$\frac{29 + 6 + 1.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.5

Add $29$ and $6$ .

$\frac{35 + 1.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.6

Add $35$ and $1.4$ .

$\frac{36.4 + 7.5 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.7

Add $36.4$ and $7.5$ .

$\frac{43.9 + 6.9 + 8.7 + 5.7 + 2.2}{12}$

Step 2.8

Add $43.9$ and $6.9$ .

$\frac{50.8 + 8.7 + 5.7 + 2.2}{12}$

Step 2.9

Add $50.8$ and $8.7$ .

$\frac{59.5 + 5.7 + 2.2}{12}$

Step 2.10

Add $59.5$ and $5.7$ .

$\frac{65.2 + 2.2}{12}$

Step 2.11

Add $65.2$ and $2.2$ .

$\frac{67.4}{12}$

Step 3

Divide $67.4$ by $12$ .

$5.61\overline{6}$

Step 4

Divide.

$5.61\overline{6}$

Step 5

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.

$5.6$