Question

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 orginal value
(b) (1/9) of the original value
(c) (1/18) of the original value
(d) (1/3) of the orignal value

Answer 1

Answer:

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Answer 2

Answer:

(a)

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