Page 440 Exercise 18.18: We found information about probabilities for the colors in a package of M&M’s at the website www.madehow.com/Volume-3/M-M-Candy.html. These probabilities are stated as only approximate. A request in 2008 (see www.exeter.edu/documents/mandm.pdf) is the source of the values in the exercise.

Page 440 Exercise 18.20: Information in the exercise comes from a June 2015 Gallup poll.