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Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 27-10-2013

  • question_answer
    \[\frac{6.5\times 4.7+6.5\times 5.3}{1.3\times 7.9-1.3\times 6.9}=?\]

    A) 3.9                               

    B) 39

    C) 34.45               

    D) 50

    Correct Answer: D

    Solution :

    \[?=\frac{6.5\times 4.7+6.5\times 5.3}{1.3\times 7.9-1.3\times 6.9}\] \[=\frac{65\times 47+65\times 53}{13\times 79-13\times 69}\] \[=\frac{65\times (47+53)}{13\times (79-69)}\] \[=\frac{5\times 100}{10}=50\]


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