4. The eye colour of any member of a group of 1770 German men is either blue or brown, and the hair colour is either blond or brown. In this group, there are 320 men who have brown hair and brown eyes, and there are 250 men who have brown hair and blue eyes. Finally, 400 have blond hair and brown eyes. What is the probability that a randomly chosen member of the group has blond hair and blue eyes? A) 0.5 B) 0.169 C) 0.226 D) 0452 E) 0.1