A Multiple-Choice Test Has 30 Questions

question 7

Multiple Choice

A multiple-choice test has 30 questions.There are 4 choices for each question.A student who has not studied for the test decides to answer all questions randomly.What type of probability distribution can be used to figure out his chance of getting at least 20 questions right?

• A)binomial distribution.
• B)Poisson distribution.
• C)hypergeometric distribution.
• D)none of the above.

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Definitions:

Universal Instantiation

A logical rule of inference that allows the derivation of a particular instance from a general statement, often used in formal proofs.

Universal Generalization

A logical rule that states if something is true for all members of a class, it is true in general.

Quantifier Negation

A logical operation that reverses the scope of a quantifier in a statement, changing its overall truth value.

Existential Generalization

A logical operation that infers the existence of at least one individual meeting a specified condition from a statement concerning that individual.