A group of employees of Unique Services will be surveyed about a new pension plan. In-depth interviews with each employee selected in the sample will be conducted. The employees are classified as follows: What is the probability that the first person selected is either in management or in supervision?
A)0.00
B)0.06
C)0.15
D)0.21

Question

A group of employees of Unique Services will be surveyed about a new pension plan. In-depth interviews with each employee selected in the sample will be conducted. The employees are classified as follows:  What is the probability that the first person selected is either in management or in supervision?
A)0.00 
B)0.06 
C)0.15 
D)0.21

Quizplus · Accepted Answer

The total number of employees in management or supervision is 13 (7+6). The probability of selecting a person in management or supervision as the first person in the sample is 13/34, which is approximately 0.38. Therefore, the probability of not selecting a person in management or supervision as the first person is 1-0.38=0.62. Thus, the probability of selecting a person in management or supervision as the first person or not selecting a person in management or supervision as the first person is 0.38+0.62=1. Hence, the correct answer is D.

A Group of Employees of Unique Services Will Be Surveyed