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RRB NTPC 2021 · Question 69 of 131

A man got a discount of 10% on sugar at Big Mart which allowed him to buy 25 kg more for ?225/-. What is the discounted price and the original price of the sugar per kg?

  1. A50p, ?2
  2. B70p, ?2
  3. C80p, ?3
  4. D90p, ?1Correct

Answer: D. 90p, ?1

Explanation

Due to x% increase/decrease in the price, the person purchased ‘y’ kg less/more in Rs. ‘a’ So, we can say that x% of a is the price of y kg. 25 kg =225 Rs 1 kg =9Rs. discounted price=9×10/100 =9×100/10 =90paise. Let Original price=10x Discounted prices =10x×90/100=9x ATQ- 225/9x -225/10x =25 10x-9x =10x2 10x =1 Rs.

Source: RRB NTPC 2021 CBT 1 Previous Year Paper (3 Feb) — ixambee compilation with answer key · reliable-secondary

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