Based on a study by Dr. P. Sorita at Indiana University, assume the eye colors in the United States are distributed as follows:  40% brown, 35% blue, 12% green, 7% gray, 6% hazel a.  If one person is randomly selected, what is the probability that this person will have brown or blue eyes? b.  If two people are randomly selected, what is the probability that at least one of them has brown eyes?

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A: The answer is attached below.