Railways Mathematics Ratio Proportion and Partnership Sample Paper Ratio, Proportion & Partnership Sample Test Paper-6

  • question_answer There is a ratio of 5 : 4 between two numbers. If 40 % of the first number is 12 then what would be the 50% of the second number?

    A)  12       

    B)         24

    C)  18                   

    D)  None of these.

    Correct Answer: A

    Solution :

    [a] Let the required numbers are 5x and 4x Then \[5x\times \frac{40}{100}=12\] \[\Rightarrow x=\frac{12\times 100}{5\times 40}=6\] 50% of second number\[=4x\times \frac{50}{100}\] \[=4\times 6\times \frac{1}{2}=12\]


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