Question
A vendor has 2700 kg of tea. He sells a portion at 30%
profit and the remaining at 20% profit. The overall profit made is 25%. Find the amount (in kg) of tea sold at 20% profit.Solution
Let the quantity of tea sold at 30% profit be m kg.
Then, the quantity sold at 20% profit = 2700 - m kg. 
Thus, the quantity of tea sold at 20% profit = 2700 - 1350 = 1350 kg.
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