The weights of 4 boxes are 30, 20, 60 and 70 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?
Weight of the boxes =Â 30, 20, 60 and 70 kilograms
(A) : 180 = 30 + 20 + 60 + 70 = 180
(B) : 150 = 20 + 60 + 70 = 150
(C) : 120 = 30 + 20 + 70 = 120
(D) : 170 = not possible
=> Ans - (D)
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