The Following Table Shows the Results of a Survey of 420

question 133

Essay

The following table shows the results of a survey of 420 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } \hline & \begin{array} { l } \text { New } \\\text { Authors }\end{array} & \begin{array} { l } \text { Established } \\\text { Authors }\end{array} & \text { Total } \\\hline \text { Successful } & 70 & 50 & 120 \\\hline \text { Unsuccessful } & 130 & 170 & 300 \\\hline \text { Total } & 200 & 220 & 420 \\\hline\end{array}$$ ​
An author is chosen at random.
Compute the estimated probability of the event that the author is established and successful.

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Definitions:

Sexually Transmitted Infection

An infection transmitted through sexual contact, caused by bacteria, viruses, or parasites.

Testosterone Level

The concentration of the male sex hormone, testosterone, in the blood, affecting various physical and psychological aspects.

Estrogen Levels

The concentration of estrogen, a primary female sex hormone, which plays a crucial role in the regulation of reproductive and sexual functions.

Prolactin Levels

The concentration of prolactin hormone in the blood, which is important for lactation and may affect reproductive health.