GRE Quiz | GRE Quantitative 2 | Question 11

If AB – BC = 9 and BC – AC = 12 then what will be the value of CA – AB?

(A) 3
(B) -4
(C) 7
(D) -21
(E) 29

Answer: (D)
Explanation:

(AB - BC) + (BC - AC) = 21
AB - AC = 21
CA - AB = -21 

So, option (D) is correct.
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