X, Y and Z complete a work in 6 days. X or Y alone can do the same work in 16 days. In how many days Z alone can finish the same work ?

X, Y and Z complete a work in 6 days. X or Y alone can do the same wor

1.	X, Y and Z complete a work in 6 days. X or Y alone can do the same work in 16 days. In how many days Z alone can finish the same work ?
A.	2
B.	6
C.	4
D.	6
Answer» D. 6