CAT 2024 Slot 3 · Quant · Question 12

CAT 2024 Slot 3 previous year question on Profit and Loss, with the answer and a step-by-step solution.

Profit and LossArithmeticMultiple choiceMedium
Gopi marks a price on a product in order to make 20% profit. Ravi gets 10% discount on this marked price, and thus saves ₹15. Then, the profit, in rupees, made by Gopi by selling the product to Ravi, is
  1. A
    25
  2. B
    10
  3. C
    15
  4. D
    20
Pick an option, then check.
Answer & solution

Answer: Option B

The saving of ₹15 is the discount itself, and the discount is 10% of the marked price.

So 0.1\times \text{MP}=15, giving a marked price of ₹150.

The marked price was set to yield 20% profit, so \text{MP}=1.2\times \text{CP}.

Therefore the cost price is \frac{150}{1.2}=125, that is ₹125.

Ravi actually pays 150-15=135, so the selling price is ₹135.

Gopi's profit is 135-125=10, that is ₹10 — the second option.

Shortcut. Work in parts: let the cost price be 100 parts, so the marked price is 120 parts and the 10% discount is 12 parts. Since 12 parts equal ₹15, one part is ₹1.25. The selling price is 120-12=108 parts, so the profit is 8 parts, that is 8\times 1.25=10.

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