Pranskster bro, I dont think the answer have to be prime but looks like thats the only solution.

Your answer: Total score 439.0 avg 39.90909090909091 is not correct coz average goal 39.9 is not a prime.

Daum bro, there are people who still have to work on World Cup time, its sad but true. Thankfully Final is on Sunday. But I watched Mexizo vs Cameroon during lunch break..lol