数学PP请教2

kallyli

1,3,8.12
if 6<x<8, (24+x)/5=x, x=6, we may know if the median is greater than the average
if x>=8, it's not certain(the following will give the reason), so 1 is not sufficent
from 2 we can get that x is larger than 8, (x+24)/5=8, x=16, so if x is larger than 16 ,median is larger than average, if 8<x<16, median is smaller than average, 2 is not suffcient
and the two together are not suffcient
so E is right