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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-20

  • question_answer
    What number has to be added to the terms of 3 : 5 to make the ratio 5 : 6?

    A)  13                   

    B)  7   

    C)  12                   

    D)  6

    Correct Answer: B

    Solution :

    \[\frac{3+x}{5+x}=\frac{5}{6}\] \[\Rightarrow \]   \[6(3+x)=5(5+x)\] \[\Rightarrow \]   \[18+6x=25+5x\] \[\therefore \]      \[\,x=25-18=7\]


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