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There are Two bottles containing 1-litre water, 1-litre alcohol, respectively. Arun used one of the bottles to dilute/concentrate a 1-litre 50% alcohol solution. Out of the following, what cannot be the alcohol content in the resulting mixture?
1. 20%
2. 30%
3. 50%
4. 70%

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Correct Answer - Option 1 : 20%

Calculation:

The solution contains 50% alcohol ⇒ 500 ml alcohol

Maximum alcohol content for the resulting mixture will be obtiained when mixed with 1-Litre alcohol.

⇒ 1.5 lItre alcohol in 2 litre solution

⇒ 75% alcohol content

Minimum alcohol content = When mixed with 1-Litre water

⇒ 0.5 litre alcohol in 2 litre solution.

⇒ 25% alcohol content.

Minimum possible alcohol content will be 25% and maximum is 75%.

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