17 packs of what ever sport it is in total, 8 packs of baseball cards, 3 fewer packs of hockey cards than football, so we have 9 football cards but you also have 3 packs fewer to football packs, meaning that 9 - 3 is 6, so the final answer is 8 baseball packs, 6 football packs, and 3 hockey packs.
Hope this helped!
Nate