MathRevolution wrote:
Is \(x^3y^2z<0?\)
1) \(x^2y<0\)
2) \(yz<0\)
Statement 1 states that y<0. We don't know anything about x. -->insufficient
Statement 2 states that either of y or z is <0. -->insufficient
Statement 1 & 2: y<0 and z>0; but still no idea about the sign of x. -->insufficient
Answer: E
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