In a group of 200 college students, 101 are enrolled in a course in   psychology, 125 are enrolled in a course in sociology and 79 are   enrolled in both. Determine how many of these students are not   enrolled?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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  •  In a group of 200 college students, 101 are enrolled in a course in  
  • psychology, 125 are enrolled in a course in sociology and 79 are  
  • enrolled in both. Determine how many of these students are not  
  • enrolled? 
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