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SSC Sample Paper SSC CGL - Sample Paper-27

  • question_answer
    The average of marks obtained by 120 candidates certain examination is 35. If the average marks obtain passed candidates are 39 and those of the failed candidates are 15. What is the number of candidates who passed examination?

    A) 100                  

    B) 120

    C) 150                              

    D) 140

    Correct Answer: A

    Solution :

    Total marks obtained by 120 candidates \[=120\times 85\]             \[=4200\] Let the number of successful candidates \[=x\] \[\therefore \] The number of unsuccessful candidates \[=(120-x)\] \[\therefore \] According to question,             \[4200=x\times 39+(120-x)15\] \[\Rightarrow \]   \[4200=29x+1800-15x\] \[\Rightarrow \]   \[24x=4200-1800\] \[\Rightarrow \]   \[24x=2400\] \[\Rightarrow \]   \[x=100\] \[\therefore \] The number of successful candidates = 100   


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