An examination consists of 20 multiple-choice questions. Suppose each question has four possible choices, but only one of them is the correct solution. If a student who did not study for the examination is going to guess at the examination, what is the probability that he guesses i. Exactly five questions correctly? ii. At most five questions correctly? iii. At least five questions correctly?
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.
An examination consists of 20 multiple-choice questions. Suppose each question has four possible choices, but only one of them is the correct solution. If a student who did not study for the examination is going to guess at the examination, what is the probability that he guesses
i. Exactly five questions correctly?
ii. At most five questions correctly?
iii. At least five questions correctly?
iv. Between five and ten questions (inclusively) correctly?
v. How many questions do you expect him to guess correctly?
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