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# GMAT Question

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GMAT Question [#permalink]  07 Jun 2009, 13:25

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Re: GMAT Question [#permalink]  07 Jun 2009, 13:55
Please state the source. Also, your subject is very vague. Considering you have posted bunches of questions with the same subject line, you're not likely to get many responses.
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Re: GMAT Question [#permalink]  07 Jun 2009, 14:48
Here's one where it pays to analyze the question stem a little bit before proceeding.

The question asks for the average of $$3x$$ and $$6y$$, two things, and so to find the average you divide that sum by 2. $$(3x+6y) / 2$$ can simplify to $$x+2y$$. Now it becomes clear that statement 1 suffices.

It shouldn't be too difficult to see why Statement 2 is insufficient. To really nail home that it isn't, one could use examples, though that shouldn't reeeeeally be necessary. Suppose $$x$$ is 4 and $$y$$ is 2. That satisfies the statement, and then the average in question is 8. However, it could also be the case that, for example, $$x$$ is 1 and $$y$$ is 5. In this case, the average in question is 11. Whatever. (And when I say "average", i'm really just plugging into $$x+2y$$). Since we get different answers, it's insufficient.
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Re: GMAT Question [#permalink]  08 Jun 2009, 14:31
Expert's post
Since there is no image and no indication of test or question number, i am going to lock this one. Moderators should be able to unlock or edit if necessary.
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Re: GMAT Question   [#permalink] 08 Jun 2009, 14:31
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