Mixtures and Allegations Practice Test 1

% of liquid B initially present in the vessel =

2

3+2

×100 = 40%
% of liquid B finally present in the vessel =

4

1+4

×100 = 80%
The second solution is liquid B which is being mixed and it has 100% liquid B.
80% of liquid B present in the resultant mixture may be taken as average percentage. So, using rule of alligation on liquid B per cent, we can write,or 1 : 2The ratio of liquid left in the vessel to liquid B being mixed = 1 : 2
Since the quantity of liquid B being mixed is 20 litres, the quantity of liquid left in the vessel is 10 litres.
Therefore, the total quantity of liquid initially present in the vessel = 10 + 20 = 30 litres
Quantity of liquid A =

3

2+3

×30 = 18 litres.