A professor uses a question bank to create quizzes for a topic. This question bank includes 21 problems. 7 of these problems are difficult and the remaining are easy. The professor usually randomly pick 5 different problems from the question bank to make a quiz. If we let X represent the number of easy problems in a quiz of 5 problems, find Var(X). (Round your answer to 2 decimal places).
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.
A professor uses a question bank to create quizzes for a topic. This question bank includes 21 problems. 7 of these problems are difficult and the remaining are easy. The professor usually randomly pick 5 different problems from the question bank to make a quiz. If we let X represent the number of easy problems in a quiz of 5 problems, find Var(X). (Round your answer to 2 decimal places).
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