In a class election, 30 students voted for Emerald and 15 students voted for Beau. What percent of students voted for Beau?
2 answers:
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Answer:
Step-by-step explanation:
Given that the probability that a person in the United States has type B+ blood is 13%.
Since four unrelated people in the United States are selected at random, we can say that each person is independent of the other to have B+ blood group.
Let X be the number of persons who have blood group B+ in the group of 4 persons.
X is Binomial with p = 0.13
a) P(X = 4) =
b) P(x =0) =
c)
d) All having B+ is unusual since probability is very negligible