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SSC Selection Post 2024 PYQ — Question 66

SSC Selection Post - Matriculation Level - 24 June 2024 - Shift 4 • Quantitative Aptitude • Q66

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The rice sold by a grocer contained 20% low-quality rice. What quantity of good-quality rice should be added to 175 kg of mixed rice so that the percentage of low-quality rice remains 10%?

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Correct answer: A

Explanation

The correct answer is Option 1 i.e. 175 kg.

Low-quality rice in 175 kg = 20% of 175 = 35 kg

Let x kg of good-quality rice be added

Now total = 175 + x

Low-quality% = 35175+x35\over175+x × 100 = 10

⇒ 35175+x35\over175+x = 1101\over10

⇒ 175 + x = 350

⇒ x = 175 kg