Each question on a multiple-choice exam has four choices. One of the choices is the correct answer, worth 6 points, another choice is wrong but still carries partial credit of 4 points, and the other two choices are worth 0 points.If a student picks answers at random, what is the expected value of his or her score for a problem? pointsIf the exam has 90 questions, what is his or her expected score?
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.
Each question on a multiple-choice exam has four choices. One of the choices is the correct answer, worth 6 points, another choice is wrong but still carries partial credit of 4 points, and the other two choices are worth 0 points.
If a student picks answers at random, what is the
points
If the exam has 90 questions, what is his or her expected score?
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