The average (arithmetic mean) of the even integers from 16 to 44 inclusive is how much greater than the average (arithmetic mean) of the even integers from 14 to 56 inclusive? Choices.
A) 10	B) 5	C) 15	D) 20	E) 7

Rationale: "so , according to a mean of a set of even numbers from 16 to 44 = ( 16 + 44 ) / 2 = 30 and mean of a set of even numbers from 14 to 56 = ( 14 + 56 ) / 2 = 35 difference = 35 - 30 = 5 answer : b ."
Answer: B