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A sample containing same number of two n...

A sample containing same number of two nuclel `A` and `B` start decaying. The decay constant of `A` and `B` are `10lambda`. The time after which `(N_(A))/(N_(a))` becomes `(1)/(e)` is

A

`(1)/(9lambda)`

B

`(1)/(18lambda)`

C

`(2)/(9lambda)`

D

`(3)/(19lambda)`

Text Solution

Verified by Experts

The correct Answer is:
A
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