Students in Peggy's class express their likes and dislikes.

Eighteen students like Physical Education.
Thirty-two like French
Twenty-five like Art.

Sixteen say the enjoy both French and Art.
Seven like Physical Education and Art.
Eight like Physical Education and French.
Only three students like all three subjects.
None does not like any subject.

Question: How many students are there in Peggy's class?

See answer