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Q.# Mathematics - Mixture Problems / मिश्रण समस्याएं

How much pure alcohol must be added to 400 ml of a solution containing 16% of alcohol to change the concentration of alcohol in the mixture to 40%?
मिश्रण में अल्कोहल की सांद्रता को 40% तक बदलने के लिए 16% अल्कोहल युक्त 400 मिलीलीटर में कितनी शुद्ध शराब मिलानी चाहिए?

[A] 160 ml
[B] 100 ml
[C] 128 ml
[D] 68 ml

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