Question
A merchant has 2500 kg of sugar. A part of it is sold at
25% profit, and the remaining at 15% profit. If the overall profit percentage is 21%, determine the quantity (in kg) of sugar sold at 15% profit.Solution
Let the quantity of sugar sold at 25% profit be y kg.
Then, the quantity sold at 15% profit = 2500 - y kg

Thus, the quantity of sugar sold at 15% profit = 2500 - 1500 = 1000 kg.
Find the value of the given expression.
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