prep 数学题一道 请教各位牛人

lmylacoste

For a certain set of n numbers,where n>1,is the average(arithmetic mean)equal to the median?
1)If the n numbers in the set are listed in increasing order,then the difference between any pair of successive numbers in the set is 2.
2)The range of the n numbers in the set is 2(n-1)


why the answer is only (1)?
in an arithmetic progression,only n is an odd,then the arithmetic mean would be the median,if an even,won't be....

looking forward persuasive answer,thanks

唛粕

顶，同问