A merchant has two types of tea:
one costing ₹70/kg and the other costing ₹100/kg. He mixes them and sells the mixture at ₹91/kg, earning a 25% profit. In what ratio did he mix the two types of tea?

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Accepted Answer

1. Selling price = ₹91 and profit = 25%. So cost price of mixture = $91/1.25 = 72.8$.

2. Use alligation with prices ₹70 and ₹100 and mean ₹72.8.

3. Differences: $100-72.8=27.2$ and $72.8-70=2.8$.

4. Ratio = $27.2:2.8 = 68:7$. So the teas are mixed in **68 : 7**.

FINAL_ANSWER: b

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