Basic Math Examples

10

$10$ ,

$10.5$ ,

$9.5$ ,

$10$ ,

$11$ ,

$9$ ,

$13$ ,

$11$

Step 1

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

$\frac{10 + 10.5 + 9.5 + 10 + 11 + 9 + 13 + 11}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add

$10$ and

$10.5$ .

$\frac{20.5 + 9.5 + 10 + 11 + 9 + 13 + 11}{8}$

Step 2.2

Add

$20.5$ and

$9.5$ .

$\frac{30 + 10 + 11 + 9 + 13 + 11}{8}$

Step 2.3

Add

$30$ and

$10$ .

$\frac{40 + 11 + 9 + 13 + 11}{8}$

Step 2.4

Add

$40$ and

$11$ .

$\frac{51 + 9 + 13 + 11}{8}$

Step 2.5

Add

$51$ and

$9$ .

$\frac{60 + 13 + 11}{8}$

Step 2.6

Add

$60$ and

$13$ .

$\frac{73 + 11}{8}$

Step 2.7

Add

$73$ and

$11$ .

$\frac{84}{8}$

Step 3

Cancel the common factor of

$84$ and

$8$ .

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Step 3.1

Factor

$4$ out of

$84$ .

$\frac{4 (21)}{8}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor

$4$ out of

$8$ .

$\frac{4 \cdot 21}{4 \cdot 2}$

Step 3.2.2

Cancel the common factor.

$\frac{4 \cdot 21}{4 \cdot 2}$

Step 3.2.3

Rewrite the expression.

$\frac{21}{2}$

Step 4

Divide.

$10.5$