In a survey of 400 music downloads, 45 were country music, 16 were religious music, and 16 were jazz, while the remainder were other genres. Calculate the following relative frequencies: a. That a music download was jazz. b. That a music download was either religious music or jazz. c. That a music download was not country music.
Suppose that a box containing music CDs has 4 with country music, 6 with rock music, 3 with jazz music, and 7 with rap music. If one CD is selected at random from the box, determine the probability that a. The CD has rap music. b. The CD has jazz music. c. The CD does not have jazz music. d. The CD has classical music.
In a survey of 500 music downloads, 160 were rock music, 55 were hip-hop, and 20 were classical, while the remainder were other genres. Calculate the following relative frequencies: a. That a music download was rock music. b. That a music download was either classical music or hip-hop. c. That a music download was not rock music.
In 2007, total revenues from sales of recorded rock, religious, and classical music amounted to $4 billion. Religious music brought in twice as much as classical music, and rock music brought in$3 billion more than religious music. How much revenue was earned in each of the three categories of recorded music?
Sharing music online (5.2, 5.3). A sample survey reports that 29% of Internet users download music files online, 21% share music files from their computers, and 12% both download and share music. Given that an Internet user downloads music files online, what is the probability that this person also shares music files?