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      Question

      In a box, there are three different types of old coins in ratio 6: 7: 8; the value of the old coin is Rs. 1, Rs. 5 and Rs. 10 respectively. If the total value of the coin is 847 rupees in the box, then find the number of coins worth 10 rupees.

      A 84 Correct Answer Incorrect Answer
      B 65 Correct Answer Incorrect Answer
      C 56 Correct Answer Incorrect Answer
      D 48 Correct Answer Incorrect Answer

      Solution

      The ratio of coins of Rs. 1, 5, and 10 rupees is = 6:7:8 The ratio of values of Rs. 1, 5, and 10 rupees is = 6x1:7×5:8 × 10 = 6:35:80 6+35+80 = 121 121 unit = 847 1 unit = 847/121   = 7 Total value of coins of Rs. 10 = 7 x 80 = Rs. 560   Total number of coins = 560/10 = 56

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