Use the General Addition Rule
-The table lists the drinking habits of a group of college students. If a student is chosen at random, find the probability of getting someone who is a woman or a heavy drinker. Round your answer to three decimal places.
$\begin{array}{l|c|c|c|c}
\text { Sex } & \text { Non-drinker } & \text { Regular Drinker } & \text { Heavy Drinker } & \text { Total } \
\hline \text { Man } & 135 & 52 & 5 & 192 \
\text { Woman } & 187 & 21 & 13 & 221 \
\text { Total } & 322 & 73 & 18 & 413
\end{array}$

A) $0.547$
B) $0.918$
C) $0.823$
D) $0.157$

Question

Use the General Addition Rule
-The table lists the drinking habits of a group of college students. If a student is chosen at random, find the probability of getting someone who is a woman or a heavy drinker. Round your answer to three decimal places.
$\begin{array}{l|c|c|c|c}
\text { Sex } & \text { Non-drinker } & \text { Regular Drinker } & \text { Heavy Drinker } & \text { Total } \
\hline \text { Man } & 135 & 52 & 5 & 192 \
\text { Woman } & 187 & 21 & 13 & 221 \
\text { Total } & 322 & 73 & 18 & 413
\end{array}$

A) $0.547$
B) $0.918$
C) $0.823$
D) $0.157$

Quizplus · Accepted Answer

The probability of choosing a woman or a heavy drinker is calculated by adding the probability of choosing a woman (221/413) to the probability of choosing a heavy drinker (18/413), and then subtracting the probability of choosing someone who is both a woman and a heavy drinker (13/413) to avoid double counting. This gives (221 + 18 - 13) / 413 = 226 / 413 ≈ 0.547.

Use the General Addition Rule -The Table Lists the Drinking

Use the General Addition Rule
-The Table Lists the Drinking