GRE : Quantitative Comparison Problem
A student has test scores of 85, x and y and an average (arithmetic mean) score of 95 on the three tests. Column A : The average (arithmetic mean) of x and y Column B : 100 Since the average of three scores is 95, the total is 95 X 3 = 285. If the score of one test is 85, the total of other tow tests is 285 – 85 = 200. That means 85 + x + y = 295 = x + y = 295 – 85 = x + y = 200 This means the average of other two tests ( x & y ) is 200/2 = 100. A is 100. B is 100. So, the answer is C. This is the Quantitative Comparison Problem. Understand the basic mathematical principles behind this problem and other problems.
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