The Following Table Shows the Results of a Survey of 410

Essay

The following table shows the results of a survey of 410 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } \hline & \begin{array} { l } \text { New } \\\text { Authors }\end{array} & \begin{array} { l } \text { Established } \\\text { Authors }\end{array} & \text { Total } \\\hline \text { Successful } & 40 & 50 & 90 \\\hline \text { Unsuccessful } & 130 & 190 & 320 \\\hline \text { Total } & 170 & 240 & 410 \\\hline\end{array}$$ ​
An author is chosen at random.
Compute the estimated probability of the event that the author is successful.