Four hundred accidents that occurred on a Saturday night were analyzed. The number of vehicles involved and whether alcohol played a role in the accident were recorded. The results are shown
Below:

$\begin{array} { l | c c c | c }
&\text { Number of Vehicles Involved}&\
\text { Did Alcohol Play a Role? } & 1 & 2 & 3 \text { or more } & \text { Totals } \
\hline \text { Yes } & 59 & 99 & 12 & 170 \
\text { No } & 22 & 177 & 31 & 230 \
\hline \text { Totals } & 81 & 276 & 43 & 400
\end{array}$

Suppose that one of the 400 accidents is chosen at random. What is the probability that the accident involved more than a single vehicle?
A) $\frac { 3 } { 100 }$

B) $\frac { 319 } { 400 }$

C) $\frac { 81 } { 400 }$

D) $\frac { 43 } { 400 }$

Question

Four hundred accidents that occurred on a Saturday night were analyzed. The number of vehicles involved and whether alcohol played a role in the accident were recorded. The results are shown
Below:

$\begin{array} { l | c c c | c } 
&\text { Number of Vehicles Involved}&\
\text { Did Alcohol Play a Role? } & 1 & 2 & 3 \text { or more } & \text { Totals } \
\hline \text { Yes } & 59 & 99 & 12 & 170 \
\text { No } & 22 & 177 & 31 & 230 \
\hline \text { Totals } & 81 & 276 & 43 & 400
\end{array}$

Suppose that one of the 400 accidents is chosen at random. What is the probability that the accident involved more than a single vehicle?
A) $\frac { 3 } { 100 }$

B) $\frac { 319 } { 400 }$

C) $\frac { 81 } { 400 }$

D) $\frac { 43 } { 400 }$

Quizplus · Accepted Answer

The probability that the accident involved more than a single vehicle is the sum of the probabilities that the accident involved 2 vehicles or 3 or more vehicles. This is $\frac { 276 } { 400 } + \frac { 43 } { 400 } = \frac { 319 } { 400 }$.

Four Hundred Accidents That Occurred on a Saturday Night Were