Correct Answer - Option 3 : 16 liters
Given
Ratio of liquids A and B in jar = 4 : 1
After addition of liquid B the ratio become = 2 : 3
Calculation
Initially (A : B) = 4 : 1 --(1)
Final (A : B) = 2 : 3 ---(2)
In both condition the amount of A is same
So, eq (2) multiplied by 2
Final (A : B) = 4 : 6
change in B = 10 L
⇒ 6x - x = 10
⇒ x = 2
So Total liquid in jar = 10x = 20 litres
then Amount of A in jar(initially) = 20/5 × 4 = 16 litres
∴ the required answer is 16 litres