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