Question

Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has five answers, of which only one is correct. Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard guesses on all ten questions, find the indicated probabilities. (Round your answers to three decimal places.)

What is the probability that Richard will answer at least half the questions correctly?

Answer #1

The probability that Richard will answer at least half the questions correctly

=0.0264+0.0055+0.0008+0.0001+0+0

=0.0328

X | P(X) |

5 | 0.0264 |

6 | 0.0055 |

7 | 0.0008 |

8 | 0.0001 |

9 | 0 |

10 | 0 |

Richard has just been given a 8-question multiple-choice quiz in
his history class. Each question has four answers, of which only
one is correct. Since Richard has not attended class recently, he
doesn't know any of the answers. Assuming that Richard guesses on
all eight questions, find the indicated probabilities. (Round your
answers to three decimal places.)
(a) What is the probability that he will answer all questions
correctly?
(b) What is the probability that he will answer all questions...

Richard has just been given a 4-question multiple-choice quiz in
his history class. Each question has five answers, of which only
one is correct. Since Richard has not attended class recently, he
doesn't know any of the answers. Assuming that Richard guesses on
all four questions, find the indicated probabilities. (Round your
answers to three decimal places.)
(a) What is the probability that he will answer all questions
correctly?
(b) What is the probability that he will answer all questions...

Richard has just been given a 6-question multiple-choice quiz in
his history class. Each question has five answers, of which only
one is correct. Since Richard has not attended class recently, he
doesn't know any of the answers. Assuming that Richard guesses on
all six questions, find the indicated probabilities. (Round your
answers to three decimal places.)
(a) What is the probability that he will answer all questions
correctly?
(b) What is the probability that he will answer all questions...

Richard has just been given a 4-question multiple-choice quiz in
his history class. Each question has four answers, of which only
one is correct. Since Richard has not attended class recently, he
doesn't know any of the answers. Assuming that Richard guesses on
all four questions, find the indicated probabilities. (Round your
answers to three decimal places.)
(a) What is the probability that he will answer all questions
correctly?
(b) What is the probability that he will answer all questions...

Richard has just been given a 6-question multiple-choice quiz in
his history class. Each question has four answers, of which only
one is correct. Since Richard has not attended class recently, he
doesn't know any of the answers. Assuming that Richard guesses on
all six questions, find the indicated probabilities. (Round your
answers to three decimal places.)
(a) What is the probability that he will answer all questions
correctly?
(b) What is the probability that he will answer all questions...

Richard has just been given a 4-question multiple-choice quiz in
his history class. Each question has four answers, of which only
one is correct. Since Richard has not attended class recently, he
doesn't know any of the answers. Assuming that Richard guesses on
all four questions, find the indicated probabilities. (Round your
answers to three decimal places.) (a) What is the probability that
he will answer all questions correctly? (b) What is the probability
that he will answer all questions...

A student has just been given a 10-question multiple-choice
quiz. Each question has five answers, of which only one is correct.
The student has not attended class recently, and doesn't know any
of the answers. Assume that guesses are made on all ten questions,
find the indicated probability. (Round your answer to three decimal
places.) What is the probability that the student will answer all
questions incorrectly?

a) A student has just been given a 7-question multiple-choice
quiz in their anatomy class. Each question has five answers, of
which only one is correct. Since this student has not attended any
classes recently, they do not know any of the answers and must
guess on all 7 questions. What is the probability they will get at
least one question correct?
a. 0.7903
b. 0.8154
c. 0.3670
d. 0.1429
b) A student has just been given a 7-question multiple-choice...

. In a history class, Colin and Diana both write a multiple
choice quiz. There are 10 questions. Each question has five
possible answers. What is the probability that Passing is
considered 70%
a) Colin will pass the test if he guesses an answer to each
question.
b) Diana will pass the test if she studies so that she has a 75%
chance of answering each question correctly.

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?...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 8 minutes ago

asked 29 minutes ago

asked 44 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago