The following table shows the results of a survey of 440 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | }
\hline & \begin{array} { l }
\text { New } \
\text { Authors }
\end{array} & \begin{array} { l }
\text { Established } \
\text { Authors }
\end{array} & \text { Total } \
\hline \text { Successful } & 60 & 40 & 100 \
\hline \text { Unsuccessful } & 150 & 190 & 340 \
\hline \text { Total } & 210 & 230 & 440 \
\hline
\end{array}$$ An established author is chosen at random.
Compute the estimated probability of the event that the established author is successful.

A) $\frac { 4 } { 23 }$
B) $\frac { 1 } { 11 }$
C) $\frac { 19 } { 23 }$
D) $\frac { 2 } { 5 }$
E) $\frac { 3 } { 5 }$

Question

The following table shows the results of a survey of 440 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } 
\hline & \begin{array} { l } 
\text { New } \
\text { Authors }
\end{array} & \begin{array} { l } 
\text { Established } \
\text { Authors }
\end{array} & \text { Total } \
\hline \text { Successful } & 60 & 40 & 100 \
\hline \text { Unsuccessful } & 150 & 190 & 340 \
\hline \text { Total } & 210 & 230 & 440 \
\hline
\end{array}$$   An established author is chosen at random.
Compute the estimated probability of the event that the established author is successful.
 
A) $\frac { 4 } { 23 }$
B)   $\frac { 1 } { 11 }$
C)   $\frac { 19 } { 23 }$
D)   $\frac { 2 } { 5 }$
E)   $\frac { 3 } { 5 }$

Quizplus · Accepted Answer

The probability that an established author is successful is calculated by dividing the number of successful established authors by the total number of established authors. This gives $\frac{40}{230} = \frac{4}{23}$.

The Following Table Shows the Results of a Survey of 440