Final answer:
The number of bands selected at random is 8.
Step-by-step explanation:
The question is asking for the number of bands selected at random. From the descriptions, we know that out of 16 bands, 5 include songs that most people actually know.
We are looking for the number of bands that are selected, which is represented by the letter r.
Therefore, the answer to the question is 8 bands are selected at random.