, , ,

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

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Divide by .

Subtract from .

Add and .

Subtract from .

Find the Mean (Arithmetic) 8 , -8 , 8 , -8