About 1/5 of all adults in the United States have type O+ blood. If four randomly selected adults donate blood, find the probability of each of the following events. (Round your answers to four decimal places.) (a) All four are type O+. (b) None of them is type O+. (c) Two out of the four are type O+.
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
About 1/5 of all adults in the United States have type O+ blood. If four randomly selected adults donate blood, find the
(b) None of them is type O+.
(c) Two out of the four are type O+.
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