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The genres of the songs on a student's iPod are: 15% country music, 21% pop, 24%...

The genres of the songs on a student's iPod are: 15% country music, 21% pop, 24% R&B, and 40% rock. Suppose that 90% of the country music songs have a fiddle, 18% of the pop songs have a fiddle, none of the R&B songs have a fiddle, and 10% of the rock songs have a fiddle. If a song is randomly selected from the iPod, and it happens to have fiddle music in the song, what is the conditional probability that it is a country song?

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