If Janice was 22 years old z years ago and Lisa will be 20 years old in p years, what was the average (arithmetic mean) of their ages 8 years ago? Choose the correct choice from the following answers: A) (z + p)/2 B) (z - p + 26)/4 C) (z - p + 16)/4 D) (z + p + 36)/2 E) (z - p + 26)/2
Today, J = z+22 and L = 20-p   8 years ago, J = z+14 and L = 12-p   The average of their ages was (z-p+26) / 2   The answer is (z - p + 26)/2.
<result>E</result>
If Janice was 22 years old z years ago and Lisa will be 20 years old in p years, what was the average (arithmetic mean) of their ages 8 years ago?