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Find the Mean 7 , 8 , 9 , 10

$7$ ,

$8$ ,

$9$ ,

$10$

Step 1

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

$\frac{7 + 8 + 9 + 10}{4}$

Step 2

Simplify the numerator.

Add

$7$ and

$8$ .

$\frac{15 + 9 + 10}{4}$

Add

$15$ and

$9$ .

$\frac{24 + 10}{4}$

Add

$24$ and

$10$ .

$\frac{34}{4}$

$\frac{34}{4}$

Step 3

Cancel the common factor of

$34$ and

$4$ .

Factor

$2$ out of

$34$ .

$\frac{2 (17)}{4}$

Cancel the common factors.

Factor

$2$ out of

$4$ .

$\frac{2 \cdot 17}{2 \cdot 2}$

Cancel the common factor.

$\frac{2 \cdot 17}{2 \cdot 2}$

Rewrite the expression.

$\frac{17}{2}$

$\frac{17}{2}$

$\frac{17}{2}$

Step 4

Divide.

$8.5$

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