10. A combination lock has 3 digit spots, each digit ranges from 0 to 9. a. How many possible combinations can we have? (the same digit can be shown in more than one spot) b. How many possible combinations are possible if a digit can be used only once? c. What is the probability of having number 1 in spot 1, number 2 in spot 2 and number 3 in spot 3? ( the same digit can be shown in more than one spot in this case).

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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.