, ,
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 .
Cancel the common factors.
Factor out of .
Cancel the common factor.
Rewrite the expression.
Divide by .
Add and .
Add and .
Find the Mean (Arithmetic) 435 , 0 , 0