

GRE : Quantitative Comparison Problem
The average arithmetic mean if 12 and 20 is equal to the average of arithmetic mean of 15 and X. Column A : X Column B : 16 From the information, we can deduce that X + 15 = 12 + 20 X + 15 = 32 X = 32 15 X = 17 X > 16 So, the answer is A. This is the Quantitative Comparison Problem. Understand the basic mathematical principles behind this problem and other problems.
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