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Railways R.R.C. (Mumbai) Solved Paper Held on 16-11-2014

  • question_answer
    Due to an increase of 30% in the price of pens, 6 pens less are available for Rs. 7.80. The present rate of pens per dozen is ?

    A) 5.32                             

    B) 6-52

    C) 4.68                 

    D) 3-58

    Correct Answer: C

    Solution :

    Suppose the present rate of 1 pen\[=Rs.1.3x\] Then,  \[\frac{7.8}{x}-\frac{7.8}{1.3x}=6\]            \[\frac{7.8\times 0.3}{1.3x}=6\]             \[x=0.3\] Now, the present rate of pens per dozen                                                      \[=0.3\times 1.3\times 12\]                                                      \[=-Rs.\,\,4.68\]


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