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Chapter 5: Q 79. (page 330)

Free downloads? Illegal music downloading has become a big problem: 29% of Internet users download music files, and 67% of downloaders say they

don鈥檛 care if the music is copyrighted.15 What percent of Internet users download music and don鈥檛 care if it鈥檚 copyrighted? Write the information given in terms of probabilities, and use the general multiplication rule.

Short Answer

Expert verified

The percentage of internet is 19.43%

Step by step solution

01

Step 1. Given Information

29 percent of users download music files, while 67 percent claim they "don't care."

02

Step 2. Concept Used

Multiplication rule P(A鈭�B)=P(A鈭�B)脳P(B/A)

03

Step 3. Calculation

According to the inquiry, P(downloadmusicfiles)=29%=0.29

P(don'tcare/downloadedmusicfiles)=67%=0.67

Use the rule of multiplication.

P(A鈭�B)=P(A鈭�B)脳P(B/A)

As a result, the following was obtained:

P(downloadedmusicfiles鈭�dontcare)=P(downloadedmusicfiles)脳P(don'tcare/downloadedmusicfiles)

=0.29脳0.1943=0.1943=19.43%

As a result, 19.43% of internet users downloaded music and don't care if it's copyrighted.

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