The following table shows the results of a survey of 400 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | }
\hline & \begin{array} { l }
\text { New } \
\text { Authors }
\end{array} & \begin{array} { l }
\text { Established } \
\text { Authors }
\end{array} & \text { Total } \
\hline \text { Successful } & 60 & 50 & 110 \
\hline \text { Unsuccessful } & 130 & 160 & 290 \
\hline \text { Total } & 190 & 210 & 400 \
\hline
\end{array}$$ An author is chosen at random.
Compute the estimated probability of the event that the author is established.

A) $\frac { 2 } { 5 }$
B) $\frac { 19 } { 40 }$
C) $\frac { 21 } { 40 }$
D) $\frac { 16 } { 29 }$
E) $\frac { 5 } { 11 }$

Question

The following table shows the results of a survey of 400 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } 
\hline & \begin{array} { l } 
\text { New } \
\text { Authors }
\end{array} & \begin{array} { l } 
\text { Established } \
\text { Authors }
\end{array} & \text { Total } \
\hline \text { Successful } & 60 & 50 & 110 \
\hline \text { Unsuccessful } & 130 & 160 & 290 \
\hline \text { Total } & 190 & 210 & 400 \
\hline
\end{array}$$   An author is chosen at random.
Compute the estimated probability of the event that the author is established.
 
A) $\frac { 2 } { 5 }$
B)   $\frac { 19 } { 40 }$
C)   $\frac { 21 } { 40 }$
D)   $\frac { 16 } { 29 }$
E)   $\frac { 5 } { 11 }$

Quizplus · Accepted Answer

The probability that the author is established is calculated by dividing the number of established authors by the total number of authors. From the table, there are 210 established authors out of a total of 400 authors. Therefore, the probability is $\frac{210}{400} = \frac{21}{40}$.

The Following Table Shows the Results of a Survey of 400