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Activity of a radioactive sample decreas...

Activity of a radioactive sample decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its activity will become

A

`(1//27)` of the original value

B

`(1//9)` of the original value

C

`(1//18)` of the original value

D

`(1//3)` of the original value

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The correct Answer is:
A
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