Basic Math Examples

3

$3$ ,

$3.9$ ,

$3.7$ ,

$3.1$ ,

$3.3$ ,

$3.6$ ,

$3.5$ ,

$3.8$

Step 1

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

$\frac{3 + 3.9 + 3.7 + 3.1 + 3.3 + 3.6 + 3.6 + 3.5 + 3.8}{9}$

Step 2

Simplify the numerator.

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Step 2.1

Add

$3$ and

$3.9$ .

$\frac{6.9 + 3.7 + 3.1 + 3.3 + 3.6 + 3.6 + 3.5 + 3.8}{9}$

Step 2.2

Add

$6.9$ and

$3.7$ .

$\frac{10.6 + 3.1 + 3.3 + 3.6 + 3.6 + 3.5 + 3.8}{9}$

Step 2.3

Add

$10.6$ and

$3.1$ .

$\frac{13.7 + 3.3 + 3.6 + 3.6 + 3.5 + 3.8}{9}$

Step 2.4

Add

$13.7$ and

$3.3$ .

$\frac{17 + 3.6 + 3.6 + 3.5 + 3.8}{9}$

Step 2.5

Add

$17$ and

$3.6$ .

$\frac{20.6 + 3.6 + 3.5 + 3.8}{9}$

Step 2.6

Add

$20.6$ and

$3.6$ .

$\frac{24.2 + 3.5 + 3.8}{9}$

Step 2.7

Add

$24.2$ and

$3.5$ .

$\frac{27.7 + 3.8}{9}$

Step 2.8

Add

$27.7$ and

$3.8$ .

$\frac{31.5}{9}$

Step 3

Divide

$31.5$ by

$9$ .

$3.5$

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.

$3.5$