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?
This has the solution to this problem:
Okay. We need to find out the biggest number that can go in the middle of the Venn diagram.
As I get, the solution is 2.
Is this correct?