Jeff is playing an arcade game. In the game, a player has six attempts to roll a small ball up a lane into various-sized rings that form a bull's-eye pattern. The center
ring is worth 50 points, and the rings going outward from the center are worth
30, 20, 10, and 0 points.
a. What are the possible outcomes for each attempt?

b. What is the likelihood that Jeff's final score will be a multiple of 5?

c. What is the likelihood that Jeff will score 75 points?

d. What is the likelihood that Jeff will roll a ball into the 50-point ring?