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A radioactive element decays by beta-emi...

A radioactive element decays by `beta-emission`. A detector records `n` beta particles in `2 s` and in next `2 s` it records `0.75 n` beta particles. Find mean life correct to nearest whole number. Given ln `|2| = 0.6931`, ln `|3|=1.0986`.

A

3

B

5

C

7

D

6

Text Solution

Verified by Experts

The correct Answer is:
C
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