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

  • question_answer
    A number is first decreased by 10% and then increased by 10%. The number so obtained is 50 less then the original number. The original number is

    A) 5900

    B)  5000

    C)  5500   

    D)  5050

    Correct Answer: B

    Solution :

    Let original number be x. \[\therefore \]      \[\frac{90}{100}x\times \frac{110}{100}=x-50\] \[\Rightarrow \]               \[\frac{99x}{100}=x-50\] \[\Rightarrow \] \[x-\frac{99x}{100}=50\]\[\Rightarrow \]\[\frac{x}{100}=50\]\[\Rightarrow \]\[x=5000\]


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