For the positive integers x, x + 2, x + 4, x + 7, and x + 17, the mean is how much greater than the median? Answers
A) 0 B) 1 C) 2 D) 4 E) 7

Rationale: "mean = ( x + x + 2 + x + 4 + x + 7 + x + 17 ) / 5 = ( 5 x + 30 ) / 5 = x + 6 median = x + 4 thus mean - median = x + 6 - ( x + 4 ) = 2 answer = c"
Answer: C