How do I use software for probability?? Is it possible? Can someone help me

The annual Atlantic Coast Conference men's basketball tournament has temporarily taken Joe's mind off the Chicago Cubs. He says to himself, "I think that Florida State has probability 0.1 of winning. North Carolina's probability is twice Florida State's, and Duke's probability is three times Florida State's."

(a) What are Joe's personal probabilities for North Carolina?_______

(b) What are Joe's personal probabilities for Duke?_______

(c) What is Joe's personal probability that one of the 12 teams other than Florida State, North Carolina, and Duke will win the tournament?_______