Approximately 7% of men and 0.4% of women are red-green color-blind (as in Exercise 11.39). Assume that a statistics class has 15 men and 25 women.
(a) What is the probability that nobody in the class is red-green color-blind?
(b) What is the probability that at least one person in the class is red-green color-blind?
(c) If a student from the class is selected at random, what is the probability that he or she will be red-green color-blind?

Exercise 11.39

The most common form of color blindness is an inability to distinguish red from green. However, this particular form of color blindness is much more common in men than in women (this is because the genes corresponding to the red and green receptors are located on the X-chromosome). Approximately 7% of American men and 0.4% of American women are red-green color-blind.