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If 10% of $x = 20 %$ of y, then x: y is equal to:

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1:2

2:1

5:1

10:1

answer is B.

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Detailed Solution

Concept- The value of 10% of x is x, while the value of 20% of y is y.
So, after solving these solutions, we will get

x

and

y

, to find the

x

y

10 %

x = 20 %

y

10 / 100 × x = 20 / 100 × y

x × 1 / 10 = y × 2 / 10

x = 2 y

x / y = 2 / 1

x : y = 2 : 1

∴

The ratio of x: y is 2: 1.
Hence, the correct answer is option 2 .

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