Question

17. The probability of a student randomly guessing the answers
to 25 multiple choice

questions is best modeled with the _______.

A. normal distribution

B. binomial distribution

C. Poisson distribution

D. exponential distribution

Answer #1

It is best modelled with **Binomial
Distribution.**

It is Binomial distribution because the student is randomly guessing the answers and the options are limited let us say 4 options are provided so a limited choice is provided. If we assume x is the number of correct answers then, x is a binomial random variable because

- Questions are independent as we are guessing
- In every question there is only two outcomes correct or incorrect
- Number of option is fixed
- The probability of being correct in all questions is constant.

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2. A multiple-choice test has 25 questions. There are four
choices for each question. A student who has not studied for the
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questions?
a. Normal distribution b. Binomial distribution c. Poisson
distribution d. None of these

A student randomly guesses at 5 multiple choice questions.
Find the probability that the student guesses 3 or more correctly.
Each question has 8 possible answers with only one correct answer,
and each question is independent of every other question. (Round to
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Binomial)

A multiple-choice exam has 80 questions, each with four possible
answers. If a student is just guessing at all the answers, the
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A.0.2
B.0.008
C.0.1
D.0.025

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question has four possible answers. Assume that a student who has
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answering any question correctly. (Round your answers to two
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(a)
A student must answer 43 or more questions correctly to obtain a
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question has four possible answers. Assume that a student who has
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(a) A student must answer 43 or more questions correctly to
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question has four possible answers. Assume that a student who has
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(a)
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