The following table shows the results of a survey of 200 authors by a publishing company. | | New Authors | Established Authors | Total | |---|---|---|---| | Successful | 18 | 44 | 62 | | Unsuccessful | 32 | 106 | 138 | | Total | 50 | 150 | 200 | Compute the relative frequency of the given event if an author as specified is chosen at random. An unsuccessful author is established.
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'The following table shows the results of a survey of 400 authors by a publishing company: New Authors Established Authors Total Successful 28 100 128 Unsuccessful 80 192 272 Total 108 292 400 Compute the relative frequency of the given event if an author as specified is chosen at random: An unsuccessful author is established.'
Adi S.
Publishing The following table shows the results of a survey of 200 authors by a publishing company: New Authors Established Authors Total Successful 8 54 62 Unsuccessful 32 106 138 Total 40 160 200 Compute the relative frequency of the given event if an author as specified is chosen at random. An established author is successful.
Donna D.
Are based on the accompanying table, which shows the results of a survey of authors by $a$ (fictitious) publishing company. $$\begin{array}{|r|c|c|c|}\hline & \begin{array}{c}\text { New } \\\text { Authors }\end{array} & \begin{array}{c}\text { Established } \\\text { Authors }\end{array} & \text { Total } \\ \hline \text { Successful } & 5 & 25 & 30 \\\hline \text { Unsuccessful } & 15 & 55 & 70 \\\hline \text { Total } & 20 & 80 & 100 \\\hline\end{array}$$ Consider the following events: S: An author is successful; $U$ : An author is unsuccessful; $N:$ An author is new; and $E: A n$ author is established. Describe the events $N \cap U$ and $N \cup U$ in words. Use the table to compute $n(N \cap U)$ and $n(N \cup U)$
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