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If 20% of a = b, then b% of 20 is equal ...

If 20% of a = b, then b% of 20 is equal to:
यदि a का 20% =b है, तो 20 का b% किसके बराबर होगा ?

A

4% of a

B

16% of a

C

8% of a

D

2% of a

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