If 23m − n = p, then which of the following represents the average (arithmetic mean) of m, n, and p, in terms of m?  Choose one:
A) 2m −1 B) 4m C) 6m D) m/5 E) 8m
23m - n = p   Add n to both sides:   23m = n + p   Add m to both sides:   24m = n + p + m   Now, divide both sides by 3   8m = (n + p + m)/3 = the average of n, p, and m   8m
<result>E</result>
If 23m − n = p, then which of the following represents the average (arithmetic mean) of m, n, and p, in terms of m?