Music to my ears: Jeri is listening to the songs on a new CD in random order. She will listen to two different songs, and will buy the CD if she likes both of them. Assume there are 10 songs on the CD, and that she would like five of them.
a. What is the probability that she likes the first song?
b. What is the probability that she likes the second song, given that she liked the first song?
c. What is the probability that she buys the CD?