Hi All,
When dealing with fractions in GMAT Quant questions, it's sometimes helpful to convert from fraction-to-decimal (doing so might make the requisite math faster or easier).
We're asked if (X+Y) is less than 1. This is a YES/NO question.
1) X < 8/9
This FACT tells us that X is LESS than .88888...., but we don't know anything about Y.
Fact 1 is INSUFFICIENT
2) Y < 1/8
This FACT tells us that Y is LESS than .125, but we don't know anything about X.
Fact 2 is INSUFFICIENT
Combined, we know that (X+Y) must be LESS than .8888.... + .125 = 1.01388888....
IF... the sum = 1, then the answer to the question is NO.
IF... the sum = 0, then the answer to the question is YES.
Combined, INSUFFICIENT
Final Answer:
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Rich
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