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SSC Sample Paper Mock Test-4 SSC CGL Tear-II Paper-1

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

    A)  100     

    B)  120

    C)  150                             

    D)  140

    Correct Answer: A

    Solution :

    Let the number successful students = x \[\therefore \] Number of unsuccessful students \[=120-x\] According to the question, \[x\times 39+(120-x)\times 15=120\times 35\] \[\Rightarrow \]   \[39x-15x+1800=4200\] \[\Rightarrow \]   \[24x=4200-1800=2400\]\[\Rightarrow \]\[x=100\]                        


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