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If N(0) is the original mass of the subs...

If `N_(0)` is the original mass of the substance of half - life period `t_(1//2) = 5 year` then the amount of substance left after `15` year is

A

`(N_0)/8`

B

`(N_0)/16`

C

`(N_0)/2`

D

`(N_0)/4`

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The correct Answer is:
A
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