Two spices priced at ₹80 per kg and ₹160 per kg are blended. They are sold at ₹140 per kg, achieving a profit margin of 25%. What is the ratio of the two spices in the mixture?

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1. **Find cost price of mixture.** A 25% profit means CP = SP / 1.25. So CP = $140/1.25=112$.

2. **Set weighted average.** Let ratio of ₹80 to ₹160 be $r:1$. Then $(80r+160)/(r+1)=112$.

3. **Solve for $r$.** $80r+160=112r+112\Rightarrow48=32r\Rightarrow r=3/2$.

4. **Give ratio.** So the ratio is **3:2**.

FINAL_ANSWER: a

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