How many students are interested in nuclear energy but are not interested in solar power?

Question

In a group of 200 college students, it is learned that:

* 150 are interested in solar power

* 25 are interested in nuclear energy

* 85 students are interested in solar power but are not interested in nuclear energy.

How many students are interested in nuclear energy but are not interested in solar power?

Answer 1

50 are interested in Nuclear because 150 are interested in Solar only, and that makes up the 200 students.