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SSC Sample Paper SSC CGL - Sample Paper-9

  • question_answer
    The student in three classes are in each class in the ratio 2: 3: 5. If 40 students are increased in each class the ratio changes to 4: 5: 7. Originally the total number of students was

    A)  100                             

    B)  180     

    C)  200     

    D)  400

    Correct Answer: C

    Solution :

    Let the number of Student in three classes be 2x, 3x and 5x respectively. Due to increase of 40 students in each class we have             \[\frac{2x+40}{3x+40}=\frac{4}{5}\] \[\Rightarrow \]   \[10x+200=12x+160\] \[\Rightarrow \]   \[2x=40\] \[\Rightarrow \]   \[x=20\] \[\therefore \] Total number of students initially             \[=2x+3x+5x=10x\]             = 200              


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