Find the Mean 330 , 170 , 480 , 220

$330$ ,

$170$ ,

$480$ ,

$220$

Step 1

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

$\frac{330 + 170 + 480 + 220}{4}$

Step 2

Cancel the common factor of

$330 + 170 + 480 + 220$ and

$4$ .

Factor

$2$ out of

$330$ .

$\frac{2 (165) + 170 + 480 + 220}{4}$

Factor

$2$ out of

$170$ .

$\frac{2 \cdot 165 + 2 \cdot 85 + 480 + 220}{4}$

Factor

$2$ out of

$2 \cdot 165 + 2 \cdot 85$ .

$\frac{2 \cdot (165 + 85) + 480 + 220}{4}$

Factor

$2$ out of

$480$ .

$\frac{2 \cdot (165 + 85) + 2 (240) + 220}{4}$

Factor

$2$ out of

$2 \cdot (165 + 85) + 2 (240)$ .

$\frac{2 \cdot (165 + 85 + 240) + 220}{4}$

Factor

$2$ out of

$220$ .

$\frac{2 \cdot (165 + 85 + 240) + 2 (110)}{4}$

Factor

$2$ out of

$2 \cdot (165 + 85 + 240) + 2 (110)$ .

$\frac{2 \cdot (165 + 85 + 240 + 110)}{4}$

Cancel the common factors.

Factor

$2$ out of

$4$ .

$\frac{2 \cdot (165 + 85 + 240 + 110)}{2 (2)}$

Cancel the common factor.

$\frac{2 \cdot (165 + 85 + 240 + 110)}{2 \cdot 2}$

Rewrite the expression.

$\frac{165 + 85 + 240 + 110}{2}$

Step 3

Simplify the numerator.

Add

$165$ and

$85$ .

$\frac{250 + 240 + 110}{2}$

Add

$250$ and

$240$ .

$\frac{490 + 110}{2}$

Add

$490$ and

$110$ .

$\frac{600}{2}$

Step 4

Divide

$600$ by

$2$ .

$300$

Find the Mean 330 , 170 , 480 , 220

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