The data in the following table show the outcomes of the testing of an allergy drug on 500 people. $$\begin{array} { l | c | c | c | c }
& \begin{array} { c }
\text { Allergy } \
\text { drug }
\end{array} & \text { Placebo } & \begin{array} { c }
\text { Control } \
\text { (no treatment) }
\end{array} & \text { Total } \
\hline \text { Improvement } & 145 & 85 & 41 & 271 \
\text { No improvement } & 55 & 115 & 59 & 229 \
\text { Total } & 200 & 200 & 100 & 500
\end{array}$$
-What is the probability that a randomly selected person either was given the placebo or
Wasn't given the placebo?
A)0
B)0.772
C)0.5
D)1

Question

The data in the following table show the outcomes of the testing of an allergy drug on 500 people. $$\begin{array} { l | c | c | c | c } 
& \begin{array} { c } 
\text { Allergy } \
\text { drug }
\end{array} & \text { Placebo } & \begin{array} { c } 
\text { Control } \
\text { (no treatment) }
\end{array} & \text { Total } \
\hline \text { Improvement } & 145 & 85 & 41 & 271 \
\text { No improvement } & 55 & 115 & 59 & 229 \
\text { Total } & 200 & 200 & 100 & 500
\end{array}$$
-What is the probability that a randomly selected person either was given the placebo or
Wasn't given the placebo?
A)0
B)0.772
C)0.5
D)1

Quizplus · Accepted Answer

The probability that a randomly selected person either was given the placebo or wasn't given the placebo includes all participants, which is 100% or a probability of 1.

The Data in the Following Table Show the Outcomes of the Testing