I want to know the answer to the following question:
Of the CDs sold, how many were by the contestants with southern ties?
All the background I'm provided with is that "Data from Nielsen SoundScan, a music-sales tracking service, showed that of the 47 million CDs sold by Idol contestants through January 2010, 85 percent were by contestants with ties to the American South.". Is that enough to answer the question?
Answer: yes