The Following Table Shows the Results of a Survey of 420

question 229

Essay

The following table shows the results of a survey of 420 authors by a (fictitious) publishing company: $$\begin{array} { | l | l | l | l | } \hline & \begin{array} { l } \text { New } \\\text { Authors }\end{array} & \begin{array} { l } \text { Established } \\\text { Authors }\end{array} & \text { Total } \\\hline \text { Successful } & 90 & 10 & 100 \\\hline \text { Unsuccessful } & 150 & 170 & 320 \\\hline \text { Total } & 240 & 180 & 420 \\\hline\end{array}$$ ​
A successful author is chosen at random.
Compute the estimated probability of the event that the successful author is established.

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Definitions:

Natural Gas

A fossil fuel consisting primarily of methane, used as an energy source for heating, cooking, and electricity generation.

Autotrophic

Referring to organisms that can produce their own food from inorganic substances using light or chemical energy, such as plants and some bacteria.

Heterotrophic

Organisms that obtain their energy by consuming other living or dead organisms.

Nonliving Environment

Refers to the abiotic components of an ecosystem, including sunlight, temperature, wind, water, and minerals.