Multiple choice

An article when sold at 10% discount on the marked price gave a profit of Rs 70. What is the cost price?

  1. 700

  2. 350

  3. 125

  4. Cannot be determined
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let CP be cost price and MP be marked price. Selling at 10% discount: SP = 0.9 × MP. Profit is Rs 70, so SP = CP + 70. This gives 0.9 × MP = CP + 70. But we have ONE equation with TWO unknowns (MP and CP). Without knowing either MP or a relationship between MP and CP, CP cannot be determined uniquely. For example, if MP = 1000, then CP = 830; if MP = 800, then CP = 630.

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