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Find the Mean 12 , 15 , 18 , -7 , -4

$12$ , $15$ , $18$ , $- 7$ , $- 4$

Step 1

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

$\frac{12 + 15 + 18 - 7 - 4}{5}$

Step 2

Simplify the numerator.

Add $12$ and $15$ .

$\frac{27 + 18 - 7 - 4}{5}$

Add $27$ and $18$ .

$\frac{45 - 7 - 4}{5}$

Subtract $7$ from $45$ .

$\frac{38 - 4}{5}$

Subtract $4$ from $38$ .

$\frac{34}{5}$

$\frac{34}{5}$

Step 3

Divide.

$6.8$

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