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SSC Selection Post 2022 PYQ — Question 59

SSC Selection Post - Matriculation Level - 10 Feb 2022 - Shift 1 • Quantitative Aptitude • Q59

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Find is b : a, if (5a + b): (a + b) = 7 : 5.

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Correct answer: A

Explanation

The correct answer is Option 1 i.e. 9 : 1.

⇒ (5a+b)(a+b)=75{(5a+b)\over(a+b)}={7\over5}

⇒ 5(5a + b) = 7(a + b)

⇒ 25a + 5b = 7a + 7b

⇒ 18a = 2b

⇒ b : a = 9 : 1