9th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    If \[x:y=1:3\], then find the value of \[\left( 7x+3y \right):\left( 2x+y \right)\].

    A) \[14:5\]               

    B)        \[15:5\]

    C) \[16:5\]    

    D)        \[17:5\]

    E) None of these

    Correct Answer: C

    Solution :

    Explanation Option [c] is correct. Let x= 1k and y = 3k, so \[=\frac{7(k)+3(3k)}{2(k)+1(3k)}=\frac{16k}{5k}=16:5\]            


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