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Question 11
The weights of 4 boxes are 90, 40, 80 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?
Solution
Weights of 4 boxes = 90, 40, 80 and 50 kilograms
(A) : 200 = not possible
(B) :Â 260 = 40 + 50Â +Â 80Â +Â 90
(C) :Â 180 = 40Â +Â 50Â +Â 90
(D) :Â 170 = 80Â +Â 90
=> Ans - (A)
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