A bottle is full of dettol. One-third of it is taken out and then an equal amount of water is poured into the bottle to fill it. This operation is done four times. Find the final ratio of dettol and water in the bottle.

A bottle is full of dettol. One-third of it is taken out and then an e

1.	A bottle is full of dettol. One-third of it is taken out and then an equal amount of water is poured into the bottle to fill it. This operation is done four times. Find the final ratio of dettol and water in the bottle.
A.	0.57986111111111
B.	0.88472222222222
C.	0.71180555555556
D.	0.45
Answer» D. 0.45