150 200 250 n

which of the dollowing could be the median of the 4 integers listed above?

1: 175 2: 215 3:235

A 1 only B 2 only C 1 and 2 only D 2 and 3 only E 1,2 and 3

我认为求中间数即是中间两数的平均数, 若为" n 150 200 250"中间数为175, 若是"150 200 250 n" 则为225, 其余情况因为n未知则不能求，所以我选A,但答案是C，请NN指教

问的是could，所以，如果n=230的话，median就是215。但235不可能为median

所以C

问题是说could be, so 若n=230，median=215. so 2 is correct as well

i.e. 150, 200, n=230, 250