Chapter 6.7, Problem 88E

The report “Airline Quality Rating 2016” (airlinequalityrating.com/reports/2016_AQR_Final.pdf, retrieved April 25, 2017) provides an overview of the complaints about airlines received by the U.S. Department of Transportation. The table below gives the number of complaints received by type of complaint for the years 2014 and 2015.

Suppose that one of these complaints is randomly selected for a follow-up interview. Use the given information to estimate the probabilities on the next page.

1. a. The probability that a complaint made in 2014 was about baggage handling.
2. b. The probability that a complaint made in 2015 was not about flight problems.
3. c. The probability that two complaints made in 2015 were both about flight problems.
4. d. The probability that a complaint made in 2014 was either about flight problems or customer service.