From a vessel containing 100 litres of ****,10 litres are drawn out and an equal amount of water is added. From the mixture,10 litres is again drawn out and same quantity of water is added. What is the final ratio of **** and water?
a) 91 : 9
b) 81 : 19
c) 80 : 20
d) 90 : 10
e) None of these
a) 91 : 9
b) 81 : 19
c) 80 : 20
d) 90 : 10
e) None of these