math
posted by Dell .
You teach 40 students. Blue is a favorite color of 22 studetns; 19 own cars; 13 like flowers; blue is the favorite color of 10 students who own cars; blue is the favorite color of 7 students who like flowers' 8 own cars and flowers; and blue is the favorite color of 5 students who own cars and like flowers. how many students do not like flowers, do not like the color blue, and do not own a car?

Looks like 6 to me