The table below describes the smoking habits of a group of asthma sufferers. $\begin{array}{r|cccc}
&&Light &Heavy \
& \text { Nonsmoker } & \text { smoker } & \text { smoker } & \text { Total } \
\hline \text { Men } & 331 & 78 & 82 & 491 \
\text { Women } & 345 & 81 & 89 & 515 \
\text { Total } & 676 & 159 & 171 & 1006
\end{array}$ What is the probability that a woman is a nonsmoker?
A)0.343
B)0.672
C)0.512
D)0.67
E)0.51

Question

The table below describes the smoking habits of a group of asthma sufferers. $\begin{array}{r|cccc} 
&&Light &Heavy \
& \text { Nonsmoker } & \text { smoker } & \text { smoker } & \text { Total } \
\hline \text { Men } & 331 & 78 & 82 & 491 \
\text { Women } & 345 & 81 & 89 & 515 \
\text { Total } & 676 & 159 & 171 & 1006
\end{array}$ What is the probability that a woman is a nonsmoker?
A)0.343
B)0.672
C)0.512
D)0.67
E)0.51

Quizplus · Accepted Answer

The probability that a woman is a nonsmoker is calculated by dividing the number of nonsmoking women by the total number of women. From the table, there are 345 nonsmoking women out of a total of 515 women. Therefore, the probability is $345 / 515 = 0.67$.

The Table Below Describes the Smoking Habits of a Group