Basic Math Examples

find the range of $18$ , $3$ , $10$ , $7$ , $8$ , $11$ , $6$ , $9$

Step 1

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

$\frac{18 + 3 + 10 + 7 + 8 + 11 + 6 + 9}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add $18$ and $3$ .

$\frac{21 + 10 + 7 + 8 + 11 + 6 + 9}{8}$

Step 2.2

Add $21$ and $10$ .

$\frac{31 + 7 + 8 + 11 + 6 + 9}{8}$

Step 2.3

Add $31$ and $7$ .

$\frac{38 + 8 + 11 + 6 + 9}{8}$

Step 2.4

Add $38$ and $8$ .

$\frac{46 + 11 + 6 + 9}{8}$

Step 2.5

Add $46$ and $11$ .

$\frac{57 + 6 + 9}{8}$

Step 2.6

Add $57$ and $6$ .

$\frac{63 + 9}{8}$

Step 2.7

Add $63$ and $9$ .

$\frac{72}{8}$

Step 3

Divide $72$ by $8$ .

$9$