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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

`(1)/(4)`

B

`(3)/(4)`

C

`(1)/(2)`

D

`1`

Text Solution

Verified by Experts

The correct Answer is:
B
Number of nuclei left after `2` half lives `=(N_(0))/(4)`
probability of a nucleus decaying `=`no. of nuclei decayed `//`total no.
`=(3N_(0)//4)/(N_(0))=(3)/(4)`
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