The following table contains data from a study of two airlines which fly to Small Town, USA. $\begin{array}{l|cc}
&\text { Number of flights} & \text { Number of flights } \
& \text { which were on time } & \text { which were late } \
\hline \text { Podunk Airlines } & 33 & 6 \
\text { Upstate Airlines } & 43 & 5
\end{array}$
If one of the 87 flights is randomly selected, find the probability that the flight selected arrived on time.
A) $\frac { 76 } { 87 }$
B) $\frac { 11 } { 76 }$
C) $\frac { 43 } { 87 }$
D) None of the above is correct.

Question

The following table contains data from a study of two airlines which fly to Small Town, USA. $\begin{array}{l|cc} 
&\text { Number of flights} & \text { Number of flights } \
& \text { which were on time } & \text { which were late } \
\hline \text { Podunk Airlines } & 33 & 6 \
\text { Upstate Airlines } & 43 & 5
\end{array}$
If one of the 87 flights is randomly selected, find the probability that the flight selected arrived on time.
A) $\frac { 76 } { 87 }$
B) $\frac { 11 } { 76 }$
C) $\frac { 43 } { 87 }$
D) None of the above is correct.

Quizplus · Accepted Answer

The total number of flights that arrived on time is 33 (from Podunk Airlines) + 43 (from Upstate Airlines) = 76. Since there are 87 flights in total, the probability that a randomly selected flight arrived on time is $\frac{76}{87}$.

The Following Table Contains Data from a Study of Two