Did you see this in an actual GMAT question? If not, please look for examples in actual GMAT questions, because when you make up your own there is a good chance you will construct something that has other errors or that is not even tested on the GMAT.
Tim Sanders Manhattan GMAT Instructor
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Ah, yeah if you can't verify a source of a problem, you should *definitely* not even look at it. Stick to official GMAT resources and MGMAT resources, because otherwise you risk learning things incorrectly from dodgy problems.
Tim Sanders Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience: https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html