GMAT Quantitative Reasoning Practice Test 4

Question : 55 of 100

Marks: +1, -0

The grade point average of the entire class is 90 . If the average of one third of the class is 96, what is the average of the rest?

Solution:

Choose a representative number of students, 3 for example. Use the average formula:

\;(96+2 X) {/} 3=90 →

\;2 X=174 →

\;X=87

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