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      Question

      The average price of two mobile

      phones, namely 'P' and 'Q' is Rs. 15,600 whereas the average price of phones 'Q' and 'R' is Rs. 16,800. If the average price of phone 'P' and 'R' is Rs. 16,200, then find the price of phone 'R'.
      A Rs.15,835 Correct Answer Incorrect Answer
      B Rs.12,500 Correct Answer Incorrect Answer
      C Rs.17,400 Correct Answer Incorrect Answer
      D Rs.22,000 Correct Answer Incorrect Answer

      Solution

      ATQ, Let the price of phone ‘P’, ‘Q’ and ‘R’ be Rs. ‘p’, Rs. ‘q’ and Rs. ‘r’, respectively. p + q = 31,200 q + r = 33,600 r + p = 32,400 So, 2(p + q + r) = 97,200 Or, p + q + r = 48,600 So, price of phone ‘r’ = 48,600 – 31,200 = Rs. 17,400

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