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SSC Sample Paper Mock Test-17 SSC CGL Tear-II Paper-1

  • question_answer
    The average of marks of 28 students in Mathematics was 50, 8 students left the school, then this average increased by 5. What is the average of marks obtained by the students who left the school?

    A) 50.5     

    B)  37.5

    C)  42.5    

    D)  45  

    Correct Answer: B

    Solution :

    Total marks of 28 students \[=28\times 50=1400\] Total marks of 20 students \[=20\times 55=1100\] \[\therefore \] Total marks of 8 students \[=1400-1100=300\] \[\therefore \]                  Average \[=\frac{300}{8}=37.5\]


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