A Hospital Reports That Two Patients Have Been Admitted Who $$\begin{array} { c c } \text { Simple Events } & \text { Probabilities } \\\text { SS } & 0.55 \\S D & 0.11 \\D S & 0.13 \\D D & 0.21\end{array}$$

A hospital reports that two patients have been admitted who have contracted Crohnʹs disease. Suppose our experiment consists of observing whether each patient survives or dies as a result of
The disease. The simple events and probabilities of their occurrences are shown in the table (where
S in the first position means that patient 1 survives, D in the first position means that patient 1
Dies, etc.) . $$\begin{array} { c c } \text { Simple Events } & \text { Probabilities } \\\text { SS } & 0.55 \\S D & 0.11 \\D S & 0.13 \\D D & 0.21\end{array}$$ Find the probability that at least one of the patients does not survive.

A) 0.45
B) 0.11
C) 0.24
D) 0.21