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The weights of 4 boxes are 90, 30, 20 and 50 kilograms. Which of the following cannot be the total weight, in kilograms; of any combination of these boxes and in a combination a box can be used only once?

The weights of 4 boxes are 90, 30, 20 and 50 kilograms. Which of the following cannot be the total weight, in kilograms; of any combination of these boxes and in a combination a box can be used only once? Correct Answer 150

The possible combinations are:

90 + 30 + 20 + 50 = 190

90 + 30 + 50 = 170

50 + 30 + 20 = 100

But combination for 150 is not possible.

Hence, the answer is 150.

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