about 38% of the population have blood type-O positive. If you randomly choose 4 people, what is the probability that none of the 4 have blood type O-positive? If you randmly choose 3 people, what is...

about 38% of the population have blood type-O positive. If you randomly choose 4 people, what is the probability that none of the 4 have blood type O-positive? If you randmly choose 3 people, what is the probability of that at least one of the 3 has blood type O-positive?