To solve a probability, you need to determine if the order is important or not. The word "If a player can play any position," indicates that the team doesn't need to specify the order. So, the possible way to pick a team of 5 players out of 8 people would be:
8C5= 8!/ 5!(8-5)!=
8C5= 8*7*6/ 3*2=56 ways