So average of R,S,T = (S+T-R)/3 since R is negative.

But the question asks for average of the coordinate points of R,S and T which are represented by r,s and t, all of which are absolute values and absolute values are positive so even I -r I = +r. Therefore the average = (s+t+r)/3.

However, the answer is E. Can someone please point out the flaw in my reasoning.

(This is from the practice video for absolute values in the 2 month study plan)