The weights of five boxes are 30, 40, 50, 70 & 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes?
Combination for 210 = 30, 40, 50, 90
Combination for 200 = 90, 70, 40
Combination for 190 =Â 90, 70, 30
There is no combination for 220 kilograms.
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