Absolute Values Question-2 month study plan

GRE Quant Problem Solving
1

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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)

2

Point R is less than 0, but r is greater than 0 being R’s absolute value. Hence -r is less than 0, and the point of R. The question wants you to find the mean of the three points, not their absolute values.