Question

A quiz consists of 15 multiple-choice questions. Each question has 5 choices, with exactly one correct choice. A student, totally unprepared for the quiz, guesses on each of the 15 questions. a. How many questions should the student expect to answer correctly? b. What is the standard deviation of the number of questions answered correctly? c. If at least 7 questions must be answered correctly to pass the quiz, what is the chance the student passes?

Answer #1

A quiz for a Psychology class consists of 5 questions. The
questions are multiple-choice with 4 possible answers each, with
only one correct answer. A student randomly guesses on all 5
questions.
create a probability distribution for the number of correct
answers
what is the probability that the student will pass with a 60%
or better
what is the probability that the student will answer less than
4 correct

A student takes a 19 question multiple choice quiz with 4
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question, what is the probability that the student gets more than 2
questions correct?

A short statistics quiz consists of two multiple choice
questions. Each question had four possible answer choices (A, B, C,
and D).
a. Make a list of the possible answer keys for the quiz or make
a tree diagram for them.
b. How many possible answer keys are there?
c. If a student guesses at random for both questions, what is
the probability they get both questions right?
d. What is the probability that C was not the correct answer...

A quiz consists of 100 multiple choice questions. Each question
has 4 possible answers (A-D) and only one answer is correct. If the
student guesses the answer to the questions, then what is the
probability earn a grade of 70% or higher? Show how to on Ti-84
Calculator

A problem on a multiple-choice quiz is answered correctly with
probability 0.95 if a student is prepared. An unprepared student
guesses between 5 possible answers, so the probability of choosing
the right answer is 1/5. Seventy-five percent of students prepare
for the quiz. If Mr. X gives a correct answer to this problem, what
is the chance that he did not prepare for the quiz?

A problem on a multiple-choice quiz is answered correctly with
probability 0.95 if a student is prepared. An unprepared student
guesses between 5 possible answers, so the probability of choosing
the right answer is 1/5. Seventy-five percent of students prepare
for the quiz. If Mr. X gives a correct answer to this problem, what
is the chance that he did not prepare for the quiz?

A quick quiz consists of a multiple-choice question with 6
possible answers followed by a multiple-choice question with 5
possible answers. If both questions are answered with random
guesses, find the probability that both responses are
correct.

A multiple-choice test consists of 10 questions. Each question
has answer choices of a, b, c,
d, and e, and only one of the choices is correct.
If a student randomly guesses on each question, what is the
probability that he gets at most 1 of them correct?
Carry your intermediate computations to at least four decimal
places, and round your answer to at least two decimal places.

A multiple-choice test consists of 7 questions. Each question
has answer choices of a, b, c, and d, and only one of the choices
is correct. If a student randomly guesses on each question, what is
the probability that he gets fewer than 2 of them correct?

In a statistics class, Maya takes a multiple-choice quiz. There
are 10 questions. Each question has five possible answers. Maya
will pass the test if she studies so that she has a 75% chance of
answering each question correctly. Let x be the number of of
correct answers. (Round probabilities to 4 decimal places)
a. Define the Random Variable, x ~
b. What is the PDF formula?
c. Find the probability that Maya answers exactly 4 of the
questions correctly?...

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