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 boxesÂ and in a combination a box can be used only once?

The weights of 4 boxes are 20, 40, 80 and 90 kilograms. Which of the f

1.	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 boxesÂ and in a combination a box can be used only once?
A.	220
B.	230
C.	150
D.	210
Answer» B. 230