A survey of the men in a certain town showed that 40% of the men have blond hair and 18 % of them have blond hair and blue eyes. The probability that a randomly selected man has blue eyes, given that he has blond hair, is %.
If you are given he has blond hair, so the total probability will be 35%. And among them, he needs to have blue eyes, its probability is 14% among the 35%. So the final probability is 14%/35%=40%.
