Step 1: Theorem
![\text{Probability of any event = }\frac{N\text{umber of required outcomes}}{N\text{umber of total possible outcome}}](https://img.qammunity.org/2023/formulas/mathematics/college/duxb5nbpx21oelvymumx7vfg2ac62y3ghx.png)
Step 2:
In this case, there are only two outcomes: Death or Alive
Possible outcomes = (death , alive)
Total possible outcomes = 2
The required outcome 'does not die', meaning she is alive (alive)
Number of required outcomes = 1
Step 3: Final answer
Probability of not die two years before you were born
![\begin{gathered} =(1)/(2) \\ =\text{ 0.5} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/yrk5u00rqfr4ii0ec9263admb4nlm2z11s.png)
Option B is the correct answer