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8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    \[\frac{a}{b}=\frac{c}{d'}\]then \[\frac{ma+nc}{mb+nd}=\]

    A) an : bm                 

    B) m : n

    C) a : b             

    D) md : an

    Correct Answer: C

    Solution :

    Let \[\frac{a}{b}=\frac{c}{d}=K\] So, a = bK, c = dK So \[\frac{ma+nc}{mb+nd}=a:b\]


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