Please Help

1. Aquinas College students were asked what states other than Michigan they spent the most days visiting the past year. Here is the distribution of results. State: Illinois Ohio Indiana Other None States Probability: 0.25 0.15 0.05 0.35 0.2 a. Why do these numbers work for a probability model? b. What is the probability that a student spent days in state other than Michigan? c. What is the probability that a student spent the most days Illinois, Ohio or Indiana