> (Update: I just found a bit a data that states that Pandora accounts for ~10% of new music discovery which is a lot better than I would have guessed.) This s

> (Update: I just found a bit a data that states that Pandora accounts for ~10% of new music discovery which is a lot better than I would have guessed.) This sounds like a version of Russell and Norvig's Mengitis question. The probability you have a stiff neck if you have meningitis is 70%. But what is the probability that you have meningitis if you have a stiff neck? Keep in mind that Meningitis is 1/50,000 cases but stiff necks are 1/100 cases. Answer: 0.14%, quite small. Similarly, the probability that you are on Pandora if you are discovered is 1/10. But what is the probability that you are discovered if you're on Pandora? Likely very, very, very small.