15-16 What is the experimental probability that any random music purchase in 1999 was a CD? * 17-18 What is the experimental probability that any random music purchase in 1999 was not a cassette? * 19-20 What is the experimental probability that any random music purchase in 1999 was a single?
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Answer:
15 - 16. 90%
17 - 18. 97%
19 - 20. 2%