If Janice was 24 years old z years ago and Lisa will be 22 years old in p years, what was the average (arithmetic mean) of their ages 6 years ago?	Choose the correct option: A) (z + p)/2 B) (z - p + 34)/4 C) (z - p + 24)/4 D) (z + p + 44)/2 E) (z - p + 34)/2
Today, J = z+24 and L = 22-p   6 years ago, J = z+18 and L = 16-p   The average of their ages was (z-p+34) / 2   The answer is (z - p + 34)/2.
<result>E</result>
If Janice was 24 years old z years ago and Lisa will be 22 years old in p years, what was the average (arithmetic mean) of their ages 6 years ago?