There are 50 girls and 50 boys at a party, all of whom have written down their names on sheets of paper for a chance to win a raffle prize. Of all the girls and boys, 10 girls have braces and 15 boys have braces. What is the probability that the child randomly chosen to win the raffle will be a boy without braces? A) 3/20 B) 3/10 C) 7/10 D) 7/20

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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.