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:

1 3
2 3
2 5
3 5

Correct Answer: 2 3

Explanation:

By the rule of alligation, we have:

Strength of first jar Strength of 2^nd jar
40%	Mean Strength 26%	19%
7		14

So, ratio of 1^st and 2^nd quantities = 7 : 14 = 1 : 2

∴ Required quantity replaced =	2
	3

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