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      Question

      If two LED TVs and one mobile phone cost ₹31,000,

      while two mobile phones and one LED TV cost ₹35,000, then the value of one mobile phone is:
      A ₹13,500 Correct Answer Incorrect Answer
      B ₹12,500 Correct Answer Incorrect Answer
      C ₹13,000 Correct Answer Incorrect Answer
      D ₹12,000 Correct Answer Incorrect Answer

      Solution

      ATQ, Let one mobile phone cost = Rs.x One LED TV cost = Rs. y According to the question 2x + y = 31,000  ...........(1) 2y + x = 35,000.............(2) Multiply eq (2) by 2, we get,  4y + 2x = 70,000 Now subtracting the above equation from eq (1), we get 4y + 2x - 2x - y = 70,000 - 31,000 3y = 39,000  y = 13,000 Hence, The cost price of one LED TV is RS 13,000

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