单选题
For the positive numbers, n, n+1, n+2, n+4 and n+8, the mean is how much greater than the median?
(A) 0
(B) 1
(C) n+1
(D) n+2
(E) n+3
(A) 0
(B) 1
(C) n+1
(D) n+2
(E) n+3
【正确答案】
B
【答案解析】[解析] 正数n, n+1, n+2, n+4和n+8和算术平均数为：
