Find the Indicated Probability What Is the Probability That a Randomly Selected Person Either

Multiple Choice

Find the indicated probability.
-The following table show the results of a clinical trial for an allergy drug. $$\begin{array} { l | c | c | c | c } & \begin{array} { c } \text { Allergy } \\\text { drug }\end{array} & \text { Placebo } & \begin{array} { c } \text { Control } \\\text { (no treatment) }\end{array} & \text { Total } \\\hline \text { Improvement } & 145 & 85 & 41 & 271 \\\text { No improvement } & 55 & 115 & 59 & 229 \\\text { Total } & 200 & 200 & 100 & 500\end{array}$$ What is the probability that a randomly selected person either was given the allergy drug or did not improve? Round your answer to the nearest thousandth when necessary.

A) 0.858
B) 0.748
C) 0.11
D) 0.458