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  5. Linear Equations in Two Variables

9th Class Mathematics Linear Equations in Two Variables Question Bank Linear Equation in two Variables

  • question_answer
    Ajay had 65 currency notes in all. Some of which were of Rs 100 denomination and the remaining of Rs 50 denomination. The total amount of all these currency notes was Rs, 5000. How much amount did he have in the denomination of Rs 100?

    A)  Rs 3000                       

    B)  Rs 2500

    C)  Rs 1000                       

    D)  Rs 3500

    Correct Answer: D

    Solution :

    (d): Let the number of 50 rupee notes be = x Then, the number of 100 rupee notes \[=65-x\] \[\therefore 50x+100\left( 65-x \right)=5000\] \[50x+6500-100x=5000\] \[50x=1500\] \[x=30,\] Hence, No. of notes of Rs. \[100=65-30=35\] So, required amount \[=35\times 100=Rs\,500\]


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