50 g of 15% (w/w) aqueous sugar solution is provided to a student to make its final concentration 20% (w/w). Which of the following is the correct way to obtain the required solution? (1) Add 3.125 g sugar in the given solution (2e) Add 12.5 g water in the given solution (3) Add 1.25 g sugar to the given solution (4) Add 31.25 g of water to the given solution

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