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?

Options

A. 180
B. 170
C. 120
D. 150

Answer

B

Explanation

Possible weights of boxes :
(i) 30 + 20 = 50 kilograms
(ii) 30 + 60 = 90 kilograms
(iii)30 + 70 = 100 kilograms
(iv)20 + 60 = 80 kilograms
(v) 20 + 70 = 90 kilograms
(vi) 60 + 70 = 130 kilograms
(vii) 30 + 20 + 60 = 110 kilograms
(viii) 30 + 20 + 70 = 120 kilograms
(ix) 30 + 60 + 70 = 160 Kilograms
(x) 20 + 60 + 70 = 150 Kilograms
(xi) 30 + 20 + 60 + 70 = 180 Kilograms.