A cereal company puts a Star Wars toy watch in each of its boxes as a sales promotion. Twenty percent of the cereal boxes contain a watch with Obi Wan Kenobi on it. You are a huge Obi Wan fan, so you decide to buy 8 boxes of the cereal in hopes that you will find an Obi Wan watch. Let X denote the number of Obi Wan watches you will have from these boxes.
a. What are the possible values of X?
b. What is the mass of X?
c. Make a plot of the probability mass function.
d. What is the CDF of X?
e. Make a plot of the CDF.