The median of $\{20, x, 15, 30, 25\}$ is $0.4$ less than the mean. If $x$ is a whole number, what is the sum of all possible values of $x$?

Question

i've tried all possible, but it says i'm wrong

Answer 1

Assuming the elements are linear {15, 20, 25, 30}, x would either be 10 (at the low end) or 35 (at the high end). "$0.4$ less than mean" does not make sense.