Question: The school band has 30 songs in their repertoire. The band played 5 songs in their first set and 7 in their second set. The band will play 2 songs for their encore. Assuming the band plays through their entire repertoire, how many songs will they play on average in the third and fourth sets? Is final answer 8?
Answer: The band played 5 + 7 = <<5+7=12>>12 songs in their first two sets.
They have 30 - 12 = <<30-12=18>>18 songs left for the third set, fourth set and encore.
Since they played 2 songs in the encore, they have 18 - 2 = <<18-2=16>>16 songs to play on the third and fourth sets
They will play 16 / 2 = <<16/2=8>>8 songs on average over the third and fourth sets.
#### 8