Refer to the Journal of Business Logistics (Vol. 36, 2015) study of performance based logistics (PBL) strategies, Exercise 1.15 (p. 25). Recall that the study was based on the opinions of a sample of 17 upper-level employees of the U.S. Department of Defense and its suppliers. The current position (e.g., vice president, manager), type of organization (commercial or government), and years of experience for each employee interviewed are listed below. Suppose we randomly select one of these interviewees for more in-depth questioning on PBL strategies.
a. What is the probability that the interviewee works for a government organization?
b. What is the probability that the interviewee has at least 20 years of experience?

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Experience (years) Interviewee Position Organization Vice president Postproduction Analyst Senior manager (mgr.) Support chief Specialist Senior analyst Division chief Commercial Government Commercial Government 30 15 10 30 4 Government Government Commercial Government Government 30 25 Item mgr. Senior mgr. MRO mgr. Logistics mgr. MRO mgr. MRO mgr. MRO mgr. Specialist Chief 10 11 12 13 14 15 16 17 Government Government Government Commercial Commercial Commercial Government Government 20 25 30 10 10 20 25