Alligation or Mixture on Arithmetic Aptitude related Questions and Answers

Question :   From a container, full of pure milk, 20% is replaced by water and this process is repeated three times. At the end of third operation, the quantity of pure milk reduces to 1. 40.00% 2. 50.00% 3. 51.20% 4. 58.80% Answer :   3 - 51.20%