At the dining center, 150 students were surveyed about their preference for dinner and
their choices were beef, chicken, or salmon. Students may indicate a preference for any
number of options, including none. The results were:
• 73 students prefer beef;
• 85 students prefer chicken;
• 96 students prefer salmon;
• 56 students prefer beef and chicken;
• 37 students prefer beef and salmon;
• 54 students prefer chicken and salmon;
• 30 students prefer all three options.
Use the Principle of Inclusion/Exclusion to determine the number of students who prefer
none of these options. Show all work and/or explanations.