Question

there are 40 students in a class, 23 have dark hair, 18 have brown eyes and 26 have dark hair, brown eyes or both how many students have neither dark nor brown eyes ( problem solving with venn diagrams chapter)

Answer 1

please help :( really stuck.

Answer 2

D is the set of people with dark hair
B is the set of people with brown eyes

the rectangle is the entire class....