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      Question

      The cost of 3 pens, 8 pencils,

      and 12 erasers at a stationery shop is Rs 90. At the same shop, the cost of 5 pens and 8 erasers is Rs 45 more than 10 pencils. By how much amount (in Rs.) does the cost of 60 pencils and 3 erasers exceed the cost of 10 pens?
      A Rs.75 Correct Answer Incorrect Answer
      B Rs.50 Correct Answer Incorrect Answer
      C Rs.20 Correct Answer Incorrect Answer
      D Rs.65 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the cost of a pen be x, a pencil be y, and an eraser be z. From the information:

      To find 60y+3z−10x: Combine (1) and (2), solve for the required expression, yielding the answer as Rs 75. 

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