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Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    A merchant has 100 kg of sugar, part of he sells at 7% profit and rest at 17% profit. He 10% as a whole. Find how much is sold at 7% profit.                                    

    A) 70 kg                

    B) 30 kg          

    C) 50 kg                

    D) 10 kg          

    Correct Answer: A

    Solution :

    Suppose x kg of sugar is sold at 7% profit. Then, \[\frac{x\times 107}{100}+\frac{(100-x)\times 117}{100}=\frac{100\times 110}{100}\] \[11700-10x=11000\] \[10x=700\] \[x=70\,\,kg\]


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