1. The odds of choosing one black ball from an urn are 9 to 13.What is the probability of getting a black ball?
2. A local amateur ice skater estimates that the probability she will place first in the next regional competition is 0.66.What are the odds she will win this competition?
3. The odds that a child entering a convenience store with her parents will not get a package of cupcakes are 1 to 8.What is the probability she will get a package of cupcakes?
4. The odds that it will snow tomorrow are 7 to 4.What is the probability that it will not snow tomorrow?