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      Question

      Ratio of three numbers is of 7 : 3 : 5. If their sum is 7200, then what is the sum of the largest and the smallest number?

      A 5800 Correct Answer Incorrect Answer
      B 4800 Correct Answer Incorrect Answer
      C 5760 Correct Answer Incorrect Answer
      D 4640 Correct Answer Incorrect Answer

      Solution

      ATQ, Let the numbers be 7x, 3x and 5x Then, according to the question, 7x + 3x + 5x = 7200 ⇒ 15x = 7200 ⇒ x = 480 ⇒ 7x = 3360, 3x = 1440 7x + 3x = 4800 ∴ Sum of the largest and smallest number = 4800

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