A jar full of whisky contains 40% alcohol. A part of this whisky is replaced by another containing 19% alcohol and now the percentage of alcohol was found to be 26%. The quantity of whisky replaced is:
Choose the correct answer
A) 1/3
B) 2/3
C) 2/5
D) 3/5
E) 4/5
Explanation:   By the rule of alligation, we have:   So, ratio of 1st and 2nd quantities = 7 : 14 = 1 : 2   Required quantity replaced =2/3.   ANSWER IS 2/3
<result>B</result>
A jar full of whisky contains 40% alcohol. A part of this whisky is replaced by another containing 19% alcohol and now the percentage of alcohol was found to be 26%. The quantity of whisky replaced is: