Data
• Total: 600 employes
,
• Instructors: 434
,
• Full-time faculty: 325
,
• Instructors were full-time faculty: 250
Procedure
The problem is asking for the number of instructors or were full-time faculty.
434 employees are instructors and 250 of them are also full-time, then:
184 of them aren't full-time.
325 are full-time and 250 are also instructors, then:
75 of them aren't instructors.
Therefore, the number of employees who are instructors or full time is:
Answer: 509