Question
Quantitative Aptitude Question on Mixture Problems
A jar contains a mixture of 175 ml water and 700 ml alcohol. Gopal takes out 10% of the mixture and substitutes it by water of the same amount. The process is repeated once again. The percentage of water in the mixture is now
A
35.2
B
30.3
C
20.5
D
25.4
Answer
35.2
Explanation
Solution
The correct answer is (A):
Final quantity of alcohol in the mixture = 700/700+175×(90/100)2×[700+175] = 567ml
Therefore, final quantity of water in the mixture = 875 - 567 = 308 ml
Hence, the percentage of water in the mixture = 308/875×100 = 35.2%