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If 10% of A is the same as 20% of B then A : B is equal to?

1 : 2
2 : 1
5 : 1
10 : 1

Correct Answer: 2 : 1

Explanation:

10% of A = 20% of B
⇒ 10/100 x A = 20/100 x B
⇒ A/10 = B/5
∴ A/B = 10/5 = 2
Hence, A : B = 2 : 1

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