When 30% of one number is subtracted from another number, the second number reduces to its own four-fifth. What is the ratio between the first and the second numbers respectively?

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BANK PO Exam (Allahabad Bank) 2010 click here to view all questions

When 30% of one number is subtracted from another number, the second number reduces to its own four-fifth. What is the ratio between the first and the second numbers respectively?

A 4 : 7

B3 : 2

C2 : 5

DNone of these

Nithin ? Aug 12 '2022 at 21:59

Correct answer is: None of these

Explanation:

let the numbers be x and y respectively.
According to the question,

\(\Large y-\frac{x \times 30}{100}=\frac{4}{5}y\)

\(\implies \frac{y}{5}=\frac{3x}{10}\)

\(= \Large x : y = \frac{10}{3 \times 5}\)

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Correct answer is: None of these Explanation: let the numbers be x and y respectively. According to the question, \(\Large y-\frac{x \times 30}{100}=\frac{4}{5}y\) \(\implies \frac{y}{5}=\frac{3x}{10}\) \(= \Large x : y = \frac{10}{3 \times 5}\) Nithin ? answered Aug 12 '2022 at 21:59 All Comments

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