Basic Math Examples

15

$15$ ,

15

$15$ ,

15

$15$ ,

10

$10$

Step 1

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

\frac{15 + 15 + 15 + 10}{4}

$\frac{15 + 15 + 15 + 10}{4}$

Step 2

Simplify the numerator.

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Step 2.1

Add

15

$15$ and

15

$15$ .

\frac{30 + 15 + 10}{4}

$\frac{30 + 15 + 10}{4}$

Step 2.2

Add

30

$30$ and

15

$15$ .

\frac{45 + 10}{4}

$\frac{45 + 10}{4}$

Step 2.3

Add

45

$45$ and

10

$10$ .

\frac{55}{4}

$\frac{55}{4}$

\frac{55}{4}

$\frac{55}{4}$

Step 3

Divide.

13.75

$13.75$

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.

13.8

$13.8$