The weights of 4 boxes are 20, 40, 60 and 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of theseÂ boxes and in a combination a box can be used only once?

The weights of 4 boxes are 20, 40, 60 and 90 kilograms. Which of the f

1.	The weights of 4 boxes are 20, 40, 60 and 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of theseÂ boxes and in a combination a box can be used only once?
A.	150
B.	170
C.	120
D.	160
Answer» E.