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      Question

      A bag contains certain number of coins of different

      denominations. The ratio of the number of Rs. 1 coins to Rs. 2 coins is 4 : 5, respectively and the ratio of number of Rs. 2 coins to Rs. 10 coins is 5 : 3 respectively. Find the total value of the Rs. 10 coins, if the total value of the Rs. 2 coins in the bag is Rs. 120.
      A Rs. 320 Correct Answer Incorrect Answer
      B Rs. 400 Correct Answer Incorrect Answer
      C Rs. 420 Correct Answer Incorrect Answer
      D Rs. 360 Correct Answer Incorrect Answer
      E Rs. 380 Correct Answer Incorrect Answer

      Solution

      Ratio of the number of coins of denominations Rs. 1 : Rs. 2 : Rs. 10 = 4 : 5 : 3
      Let, the number of coins of Rs. 1, Rs. 2 and Rs. 10 in the bag be 4x, 5x and 3x.
      Since, the total value of Rs. 2 coins in the bag is Rs. 120
      So, value of Rs. 2 coins = 5x × 2 = 10x
      10x = 120, x = 12
      Therefore, number of Rs. 10 coins in the bag 3x = 36
      So, required value of Rs. 10 coins = 3 × 12 × 10 = Rs. 360

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