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The decay constant of a radioactive samk...

The decay constant of a radioactive samkple is 0.02 disintegration per day. The half life (T) and the mean life `(barT)` in days ae

A

`T = 50 and bar T = 34.65`

B

`T = 34.65 and bar T = 50`

C

`T = 34. 65 and barT = 100`

D

`T = 50 and bar T = 69.30`

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