CPM Homework Help : CC2 Problem 5-146

Multiple Choice: Which of the following expressions could be used to find the average (mean) of the numbers $k$ , $m$ , and $n$ ?

Hint:

The average of a set of numbers is the sum of the values divided by the number of values in the set.

More Help:

Which of the above choices best represents the average? Do any choices include a summation of the numbers $k$ , $m$ , and $n$ and also divide by this number of values?

$k+m+n$

$3(k+m+n)$

$\frac { k + m + n } { 3 }$
Answer (c):
$\frac{k+m+n}{3}$

$3k+m+n$