The average (arithmetic mean) of 20, 40, and 60 is 5 more than the average of 20, 60, and what number? Choose the correct choice from the following answers:  A) 25  B) 30  C) 35  D) 40  E) 45

Rationale: "a 1 = 120 / 3 = 40 a 2 = a 1 - 5 = 35 sum of second list = 35 * 3 = 105 therefore the number = 105 - 80 = 25 a"
Answer: A