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Two vessels contain equal quantities of 40% alcohol. Sachin changed the concentration of the first vessel to 50%' by. Adding extra quantity of pure alcohol. Vivek changed the concentration of the second vessel to 50% replacing a certain quantity of the solution with pure alcohol. By what percentage is the quantity of alcohol added by Sachin more/less than that replaced by Vivek? `11 1/9%` b. `11 1/9%` c. `16 2/3%` d. `20 %` more

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