Question

Twelve students in Mrs. Stephenson's class have brown eyes. Twenty students in the class have a lunch box. Of Mrs. Stephenson's $30$ students, what is the least possible number of students who have brown eyes and a lunch box

Answer 1

Explanation:

Since 20 students have a lunch box, 10 students don't, so 2 out of those 12 students who have brown eyes have a lunch box.

Therefore, 2 students have both.

Hope I helped :]