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by Ian Stewart » Fri Oct 15, 2010 4:01 pm
skalevar wrote:What is the value of x + y?

1) xy = 24
2) x/y = 8/3

OE is E.
This is from readyforgmat.com Advanced Quant.

Why E?

Any explanations are much appreciated.
Using both statements, x and y could be 8 and 3, or -8 and -3, so we can't find a single value for x+y. So the answer is E.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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