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13) The table shows the results of a survey of 100 authors by a publishing company....

13) The table shows the results of a survey of 100 authors by a publishing company.

   New Authors Established Authors Total
Successful 5 25 30
Unsuccessful 10 60 70
Total 15 85 100

Compute the following conditional probability.

An author is established, given that she is successful.

14) The following table shows the results of a survey of authors by a (fictitious) publishing company. HINT [See Example 5.]

New Authors Established Authors Total
Successful 9 20 29
Unsuccessful 17 51 68
Total 26 71 97

What percentage of new authors are unsuccessful? (Give the answer to two decimal places.)
%

What percentage of unsuccessful authors are new? (Give the answer to two decimal places.)
%

Math   Statistics-And-Probability   
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