Find the indicated probability.
-The table below describes the smoking habits of a group of asthma sufferers. $$\begin{array} { r | c c c c r }
& \text { Nonsmoker } & \begin{array} { c }
\text { Occasional } \
\text { smoker }
\end{array} & \begin{array} { c }
\text { Regular } \
\text { smoker }
\end{array} & \begin{array} { c }
\text { Heavy } \
\text { smoker }
\end{array} & \text { Total } \
\hline \text { Men } & 334 & 50 & 68 & 32 & 484 \
\text { Women } & 357 & 30 & 89 & 37 & 513 \
\text { Total } & 691 & 80 & 157 & 69 & 997
\end{array}$$ If one of the 997 people is randomly selected, find the probability of getting a regular or heavy smoker.
A) 0.157
B) 0.442
C) 0.227
D) 0.100

Question

Find the indicated probability.
-The table below describes the smoking habits of a group of asthma sufferers. $$\begin{array} { r | c c c c r } 
& \text { Nonsmoker } & \begin{array} { c } 
\text { Occasional } \
\text { smoker }
\end{array} & \begin{array} { c } 
\text { Regular } \
\text { smoker }
\end{array} & \begin{array} { c } 
\text { Heavy } \
\text { smoker }
\end{array} & \text { Total } \
\hline \text { Men } & 334 & 50 & 68 & 32 & 484 \
\text { Women } & 357 & 30 & 89 & 37 & 513 \
\text { Total } & 691 & 80 & 157 & 69 & 997
\end{array}$$ If one of the 997 people is randomly selected, find the probability of getting a regular or heavy smoker.
A) 0.157
B) 0.442
C) 0.227
D) 0.100

Quizplus · Accepted Answer

The probability of getting a regular or heavy smoker is equal to the sum of the probabilities of selecting a regular smoker and a heavy smoker. From the table, the number of regular smokers is 157 and the number of heavy smokers is 69, so the total number of regular or heavy smokers is 157 + 69 = 226. The probability of selecting a regular or heavy smoker is therefore 226/997 ≈ 0.227.

Find the Indicated Probability If One of the 997 People Is Randomly Selected, Find