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%. Find the quantity of whisky replaced.

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Solution

By the rule of alligation we have
So ratio of 1st and 2nd quantities $= 7 : 14 = 1 : 2$
$∴$ Required quantity replaced = $\frac{2}{3}$

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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%. Find the quantity of whisky replaced.

By the rule of alligation we haveSo ratio of 1st and 2nd quantities =7:14=1:2∴ Required quantity replaced = 23

By the rule of alligation we have
So ratio of 1st and 2nd quantities $= 7 : 14 = 1 : 2$
$∴$ Required quantity replaced = $\frac{2}{3}$