The problem can be approached using the formula for Venn Diagrams:
Total = n(A) + n(B) - n(both A and B) + n(neither A nor B)
Here, the n signifies quantity [ n(A) represents the number of elements in set A ]
We can define:
- set A as students taking Ethics
- and set B as those enrolled in Metaphysics
Provided information:
Total = 15,000
n(A) = 2200
n(both A and B) = 1700
n(neither A nor B) = 9500
Plugging this data into our formula yields:

Therefore, 5000 students are taking metaphysics this semester.
*** If we wish to find out how many are taking only metaphysics , we can deduct n(both A and B) from 5000. Thus, we conclude ***
***
ANSWER:
Total students enrolled in Metaphysics = 5000
Students taking only Metaphysics = 3300