GMAT Data Sufficiency. How do you know if a statement on a GMAT data sufficiency question is sufficient or not? The Solvability Rule will help you to determine that on certain types of questions! Learn what the Solvability Rule is from GMAT expert Brett Ethridge, and how to apply it to a sample GMAT data sufficiency problem and get more right answers! For more great GMAT tips and strategies, visit www.dominatethegmat.com/blog/

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