A man possesses five coins, two of which are double-headed, one is double tailed, and two are normal fair coins. He shuts his eyes, picks a coin at random, and tosses it. (d) He opens his eyes and sees that the coin is showing heads. What is the probability that the lower face is a head? (e) He discards this coin, picks another one at random (but not the same coin), and tosses it. What is the probability that it shows heads?

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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.