Question

A student guesses on every question of a multiple-choice test that has 7 questions, each with 3 possible answers. What is the probability that the student will get at least

5 of the questions right?

Answer #1

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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
the nearest ten thousandths. I.e. 4 decimal places. Use the
Binomial)

A student takes a containing 19 multiple-choice questions. Each
question has 5 choices. If the student guesses, what is the
probability that he will get between 3 and 5 (both inclusive)
questions right? Round your answer to four decimal places.

A student takes an exam containing 19 multiple choice questions.
Each question has 5 choices. If the student guesses, what is the
probability that he will get less than 7 but more than 5 questions
right? Round your answer to four decimal places

MC1701: A test consists of 10 multiple choice questions, each
with five possible answers, one of which is correct. To pass, a
student must get at least 6 correct on the test. If a student
randomly guesses at every question, what is the probability that
the student fails the test?
a.
2.6%
b.
20%
c.
80%
d.
97.4%
e.
99.4%
f.
None of these

An unprepared student must take a 7 question multiple
choice test that has 5 possible answers per question. If the
student guesses on the first question, what's the probability that
they will answer that question incorrectly?
How do you solve?

An unprepared student must take a 10-question multiple-choice
test that has 5 possible answers per question. If the student
guesses on all the questions what is the probability that they will
pass the exam. (70% required to pass)

If a student randomly guesses at 15 multiple-choice questions,
find the probability that the student gets more than 2 correct.
Each question has 4 possible choices.

If you make random guesses for 20 multiple choice test questions
each with four possible answers, what is the probability of
a) Getting at least one correct (5 points)
b) Getting all
answers wrong; (5 points)

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?

A student takes a 40-question multiple-choice exam but did not
study and randomly guesses each answer. Each question has three
possible choices for the answer. Find the probability that the
student guesses more than 75% of the questions correctly. (Round
your answer to three decimal places.)

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