In what ratio should sugar costing ₹27 per kg be mixed with sugar costing ₹55 per kg so that by selling the mixture at ₹57.6 per kg, there is a profit of 44%? 

This question was previously asked in
RPF Constable 2024 Official Paper (Held On: 09 Mar, 2025 Shift 1)
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  1. 15 : 13
  2. 15 : 17
  3. 14 : 16
  4. 15 : 11

Answer (Detailed Solution Below)

Option 1 : 15 : 13
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RPF Constable Full Test 1
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Detailed Solution

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Given:

Cost of sugar 1 = ₹27 per kg

Cost of sugar 2 = ₹55 per kg

Selling price of mixture = ₹57.6 per kg

Profit = 44%

Formula used:

Cost price of mixture = Selling price / (1 + Profit/100)

Mean price = Cost price of mixture

Ratio = (Price of costlier sugar - Mean price) : (Mean price - Price of cheaper sugar)

Calculation:

Cost price of mixture = 57.6 / (1 + 44/100)

⇒ Cost price of mixture = 57.6 / 1.44

⇒ Cost price of mixture = ₹40

Mean price = ₹40

Ratio = (55 - 40) : (40 - 27)

⇒ Ratio = 15 : 13

∴ The correct answer is option (1).

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