Answer: I think it's P(1 win and 2 losses)
Step-by-step explanation: That is most accurate because there are 3 games, and you can't split 3 in half. (Well you can but then it would equal 1.5 and you can't win or lose a game 1.5 to 1.5). So splitting 3 is most accurate if you do 2 for 1 and 3 for another.
Hope this helps : D