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      Question

      The weights of 4 cartons are 20, 60, 70 and 90

      kilograms. Which of the following cannot be the total weight in kilograms of any combination of these cartons and a carton can be used at most once in a combination?
      A 150 Correct Answer Incorrect Answer
      B 200 Correct Answer Incorrect Answer
      C 110 Correct Answer Incorrect Answer
      D 160 Correct Answer Incorrect Answer

      Solution

      20 + 60 + 70 = 150 20 + 90 = 110 70 + 90 = 160 200 is not possible.

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