A biased coin is tossed three times. At each toss, the probability of getting a head is two times the probability of getting a tail. Let the random variable X be the total number of heads obtained. (a) Construct the probability distribution table for X. (b) Find the probability of getting at least one head.

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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.