A trader mixes two qualities of coffee. The first quality costs ₹240 per kg and is mixed with the second quality in the ratio 5:7. If the mixture is sold at ₹200 per kg (at no profit, no loss), what is the cost per kg of the second quality of coffee(to the nearest integer)?

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Accepted Answer

1. Let the cost of second quality be $x$ per kg.

2. The average cost: $\frac{5	imes240 + 7x}{5+7}=200$.

3. So $1200+7x=2400$, hence $7x=1200$ and $x=171.4286$.

4. Nearest integer is **₹171**.

FINAL_ANSWER: b

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