What is the probability of a radioactive nucleus surviving one mean life?

PHYSICS · Single correct · CBSE · Physics · Nuclei · Nuclei

Problem

What is the probability of a radioactive nucleus surviving one mean life? (1)

\frac{1}{e}

(2)

\frac{1}{e+1}

(3)

1-\frac{1}{e}

(4)

\frac{1}{e}-1