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Test # 104


1.
Three math classes: X, Y, and Z, take an algebra test.
The average score in class X is 83. The average score in class Y is 76.
The average score in class Z is 85.
The average score of all sudents in classes X and Y together is 79.
The average score of all students in classes Y and Z together is 81.
What is the average for all the three clalsses?

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Quantitative Aptitude
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Idiom of the Day

catch (someone) in the act of (doing something)
to catch someone doing something illegal or private
The police caught the politician in the act of taking money from the business owner.

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