We give a test to a group of students; the results are summarized below. Grades and Year in School A Total Freshman 11 4 16 31 Sophomore 8 18 31 Total 19 9. 34 62 a) If one student is chosen at random, find the probability that the student got a B. Round your answer to 4 decimal places. The probability that a randomly-chosen student got а Bis b) If one student is chosen at random, find the probability that the student was a freshman and got a B. Round your answer to 4 decimal places. The probability they were a freshman and got a B is c) If one student is chosen at random, find the probability that the student was freshman or got a B. Round your answer to 4 decimal places. The probability that they were a freshman or got a B is

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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.