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Find the Mean 1 , 0.2+(-4.2)

$1$ , $0.2 + (- 4.2)$

Step 1

Remove parentheses.

$1, 0.2 - 4.2$

Step 2

Subtract $4.2$ from $0.2$ .

$1, - 4$

Step 3

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

$\frac{1 - 4}{2}$

Step 4

Subtract $4$ from $1$ .

$\frac{- 3}{2}$

Step 5

Cancel the common factor of $- 3$ and $2$ .

Rewrite $- 3$ as $1 (- 3)$ .

$\frac{1 (- 3)}{2}$

Cancel the common factors.

Rewrite $2$ as $1 (2)$ .

$\frac{1 \cdot - 3}{1 \cdot 2}$

Cancel the common factor.

$\frac{1 \cdot - 3}{1 \cdot 2}$

Rewrite the expression.

$\frac{- 3}{2}$

$\frac{- 3}{2}$

$\frac{- 3}{2}$

Step 6

Move the negative in front of the fraction.

$- \frac{3}{2}$

Step 7

Divide.

$- 1.5$

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