A vendor mixes two types of tea - one costing ₹150 per kg and another costing ₹200 per kg, in the ratio 2 : 3. If he sells the mixture at ₹180 per kg, find his gain or loss percent.

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1. Find cost price per kg by weighted average: $CP=\frac{2*150+3*200}{2+3}=\frac{900}{5}=180$.

2. Selling price $SP=180$.

3. Since $SP=CP$, there is no gain or loss.

FINAL_ANSWER: d

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