Question

In a class, every student knows French or German (or both). 15 students know French, and 17 students know German.

1. What is the smallest possible number of students in that class?
2 What is the largest possible number of students in that class?

Answer 1

17 is the smallest, 32 is the largest

Explanation:

For 17 to be the smallest number of students, 15 students would know both French and German while 2 know just German. The maximum would be 32, with each student knowing only either French or German.