Algebra Examples

$23$ , $16$ , $15$ , $18$ , $20$ , $17$ , $4$ , $7$ , $15$

Step 1

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

$\frac{23 + 16 + 15 + 18 + 20 + 17 + 4 + 7 + 15}{9}$

Step 2

Simplify the numerator.

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Add $23$ and $16$ .

$\frac{39 + 15 + 18 + 20 + 17 + 4 + 7 + 15}{9}$

Add $39$ and $15$ .

$\frac{54 + 18 + 20 + 17 + 4 + 7 + 15}{9}$

Add $54$ and $18$ .

$\frac{72 + 20 + 17 + 4 + 7 + 15}{9}$

Add $72$ and $20$ .

$\frac{92 + 17 + 4 + 7 + 15}{9}$

Add $92$ and $17$ .

$\frac{109 + 4 + 7 + 15}{9}$

Add $109$ and $4$ .

$\frac{113 + 7 + 15}{9}$

Add $113$ and $7$ .

$\frac{120 + 15}{9}$

Add $120$ and $15$ .

$\frac{135}{9}$

Step 3

Divide $135$ by $9$ .

$15$