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8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    Of a certain sum, \[{{n}_{2}}\]rd is invested at 3%\[{{R}_{k}}%\]th at 6% and the rest at 8%. If the SI for 2 years from all these investments amounts to Rs.600. Then the original sum was

    A) Rs.2000                

    B) Rs.3000

    C) Rs.4000                

    D) Rs.5000

    Correct Answer: D

    Solution :

    Remaining part \[\frac{700}{3}%\] Average rate % per annum (R) \[\frac{200}{3}%\] \[\frac{100}{3}%\] \[11\frac{1}{9}%\] \[6\frac{2}{3}\] \[\frac{a}{b}=\frac{c}{d'}\]


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