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Half-life of a radioactive substance A i...

Half-life of a radioactive substance A is 4 days. The probability that a nuclear will decay in two half-lives is

A

(a) 1/4

B

(b) 3/4

C

(c) 1/2

D

(d) 1

Text Solution

Verified by Experts

The correct Answer is:
B
After two half-lives 1/4th fraction of nuclei will remain un-decayed. Or, 3/4th fraction will decay. Hence, the probability that a nucleus decays in two half-lives is 3/4.
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