The weights of 4 boxes are 20, 40, 80 and 90 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?
Weights of 4 boxes = 20, 40, 80 and 90 kilograms
(A) : 220 = not possible
(B) : 230 = 20 + 40 + 80 + 90
(C) : 150 = 20 + 40 + 90
(D) : 210 = 40 + 80 + 90
=> Ans - (A)
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