There are three classes, each consisting of 20 students. From this group of 60 students, a group of 3 students is to be chosen. i. What is the probability that all 3 students are in the same class? ii. What is the probability that 2 of the 3 students are in the same class and the other student is in a di erent class?
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.
There are three classes, each consisting of 20 students. From this group of 60 students, a group of 3 students is to be chosen.
i. What is the
ii. What is the probability that 2 of the 3 students are in the same class and the other student is in a di erent class?
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