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GRE : Quantitative Comparison Problem
This is the Quantitative Comparison Problem-10.Understand the basic mathematical principles behind this problem and other problems.
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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