A Marketing Researcher at a Computer Company Did a Study

Multiple Choice

A marketing researcher at a computer company did a study examining user satisfaction with two operating systems.A total of 300 users were surveyed on the type of operating system used and their satisfaction with it.Use the following data set to answer questions 6-14:
Which of the following is an expression of the probability of a simple event?

A) The probability that a user is satisfied given use of either system 9 or 10.
B) The probability that a user is not satisfied with system 9.
C) The probability that a user is not satisfied with either system 9 or 10.
D) The probability that people use system 9,but not system 10.