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Testing Statement (2) Independently
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GMAT
GMAT.185 Testing Statement (2) Independently
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What is x - y? Statements: (1) x = 5. (2) x
2
- y
2
= 0 and x != y. Using only statement (2), choose the correct independent sufficiency judgment.
A
Statement (2) depends on the value x = 5, so it cannot be tested alone.
B
Statement (2) is automatically secondary and therefore not independently judged.
C
Statement (2) alone is not sufficient; statement (2) implies x = -y but does not fix x.
D
Statement (2) alone is sufficient; it determines the difference x - y without statement (1).
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