Marked price ofa chair is Rs. 5000. After giving two successive discounts of 10 percent and x percent, the chair is sold for Rs. 3150. What ts the value of x?
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Correct answer: D
Explanation
The correct answer is option 4 i.e. 30 percent.
first discount = 10%
second discount = x%
Price after 10% discount = 5000 × (1 − 10/100) = 5000 × 0.90 = 4500
Price after second discount = 4500 × (1 − x/100) = 3150
⇒ 1 − x/100 = 3150/4500 = 0.7
⇒ x/100 = 1 - 0.7
⇒ x = 0.3 × 100 = 30