As in Exercise 2.1 and Example 3.11, a song is chosen at random from a person's mp3 player. The student makes a partition of the sample space, according to genre of music. The table below

Let A be the event that a song is either blues, jazz, or rock, i.e.,
A = {x | x is a blues, jazz, or rock, song},
When one song is chosen at random. Let B, J, R denote the events that the song is a blues, jazz, or rock song, respectively.
Find P(B | A) and P(J | A) and P(R | A). Since B, J, R are disjoint and A = B U J U R, these three answers should sum to 1.

1032 Alternative 330 Blues 275 Books & Spoken183 Gospel 1786 Pop 83 Electronic 56 Metal 508 Folk 2718 Other 1468 Children's Music82 Hip-Hop 403 R&B 564 Holiday 8286 Rock 921 Classical 6169 Country 537 Jazz 1432 Soundtrack 178 Easy Listening106 Latin 216 World