 # Aptitude - Aptitude-Average And Interests

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If one student from group A is shifted to group B and that results in increase weight of both groups, then of the following is true ?

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If the groups Aand B are combined and they are called as group D, then which of the following is true?

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There match classes X,Y and z, take an algebra test. Tthe 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 students in classes X and Y together is 79.The average score of all syudents in classes Y and Z together is 81. what is the average for all the three classes?

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The average of 10 scores is 80. when the highest and the lowest scores are dropped, the average is 81. If highest score is 92, then lowest score will be ?

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There are duplicating machines in an office. The fastest of the machines make P copies in 10 hours and slowest of the machines makes P copies in 11 hours. If each machines makes P copies, then averages time per machine cannot be ?

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