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w, x, y, and z are different integers. If w/x = y/z, which of the following COULD be true?
i) wy ≠0
ii) w + x = y + z
iii) w + y = x + z
A) i only
B) i & ii only
C) i & iii only
D) ii & iii only
E) I, ii & iii
Source: www.gmatprepnow.com
Difficulty level: 700
Answer: E
i) wy ≠0
ii) w + x = y + z
iii) w + y = x + z
A) i only
B) i & ii only
C) i & iii only
D) ii & iii only
E) I, ii & iii
Source: www.gmatprepnow.com
Difficulty level: 700
Answer: E
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