If a student randomly guesses at 20 questions, find the
probability that the student gets exactly four correct. Each
question has four possible choices.
Homework Answers
X ~ Binomial (n,p)
Where n = 20 , p = 1/4 = 0.25 (Probability of one correct out of four choices)
Binomial probability distribution is
P(X) = nCx px ( 1 - p)n-x
P( X = 4) = 20C4 0.254 0.7516
= 0.1897
Add Answer to:
If a student randomly guesses at 20 questions, find the
probability that the student gets exactly...
a.) If a student randomly guesses at 20 multiple-choice questions, find the probability that the student...
a.) If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct. Each question has four possible choices. 0.190 0.162 0.085 0.218 b.) 80% of members of a club consume alcoholic beverage. Of 14 members are randomly selected what is the probability that all of them drinks alcohol beverage? 0.044 0 1 0.8 c.) A school is sending 12 children to a camp. If 20% of the children in the school are...
Mary's Final Exam for Psychology has 10 True/False questions and 10 multiple choice questions with 4 choices for each answer. Assuming Mary randomly guesses on every question: **Write answers usi...
Mary's Final Exam for Psychology has 10 True/False questions and 10 multiple choice questions with 4 choices for each answer. Assuming Mary randomly guesses on every question: **Write answers using 3 decimal places* a.) What's the probability that she gets at least 8 of the 10 true/false questions correct? b.) What's the probability that she gets at least 6 of the 10 multiple choice questions correct? c.) If the multiple choice questions had 5 choices for answers instead of 4,...
A student takes a multiple choice test consisting of 5 questions where there are 4 choices...
A student takes a multiple choice test consisting of 5 questions where there are 4 choices per question. Also, each question is worth 20 points. Suppose the student guesses on each question. Let X be the number of questions the student gets correct. The probability distribution for X is given below. Find the probability that the student gets at least a 60 on the test. Give your answer to four decimal places.
Suppose a quiz has 12 multiple choice questions. Each question has 4 answer choices. If a...
Suppose a quiz has 12 multiple choice questions. Each question has 4 answer choices. If a student takes the quiz and randomly guesses on every question.... Find the probability the student gets between 1 and 6, exclusive, questions correct? Find the probability the student gets more than 8 questions correct?
4. A student is taking a multiple-choice quiz where each question has four choices. The student...
4. A student is taking a multiple-choice quiz where each question has four choices. The student randomly guesses the answers to the five-question quiz. What is the probability that the student gets all of the questions correct? (TEKS G.13.E) 1 (В A 256 1024 - D 5 16
QUESTION 14 QUESTION 14 Find the indicated binomial probability. Round to five decimal places when necessary....
QUESTION 14
QUESTION 14 Find the indicated binomial probability. Round to five decimal places when necessary. A multiple choice test has 30 questions, and each has four possible answers, of which one is correct. If a student guesses on every question, find the probability of getting exactly 12 correct.
5) A student takes a multiple choice test with 12 questions, Each question has 4 possible...
5) A student takes a multiple choice test with 12 questions, Each question has 4 possible answers only one of which is correct. .If this student guesses on all of the questions what is the probability he gets exactly three correct answers? A) 0.1974 C) 0.2323 B) 0.2825 D) 0.2581 E) 0.1105
Question 7 (4 points) A student takes a multiple choice test consisting of 5 questions where...
Question 7 (4 points) A student takes a multiple choice test consisting of 5 questions where there are 4 choices per question. Also, each question is worth 20 points. Suppose the student guesses on each question. Let X be the number of questions the student gets correct. The probability distribution for X is given below. Find the probability that the student gets at least a 60 on the test. Give your answer to four decimal places. x10 11 12 13...
7. a. b. c. Assume that random guesses are made for nine multiple choice questions on...
7.
a.
b.
c.
Assume that random guesses are made for nine multiple choice questions on an SAT test, so that there are n = 9 trials, each with probability of success (correct) given by p = 0.2. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4. P(X<4)= (Round to four decimal places as needed.) Assume that random guesses are made for 2 multiple-choice questions...
A multiple choice quiz has4 questions. Each question has 5 possible answers, only one of which...
A multiple choice quiz has4 questions. Each question has 5 possible answers, only one of which is correct. A student has not studied for the quiz and guesses randomly on each question. What is the probability that the student gets at least one correct answer? Show your calculation, and write your answer as either a reduced fraction or a decimal rounded to four places.
Mary's Final Exam for Psychology has 10 True/False questions and 10 multiple choice questions with 4 choices for each answer. Assuming Mary randomly guesses on every question: **Write answers using 3 decimal places* a.) What's the probability that she gets at least 8 of the 10 true/false questions correct? b.) What's the probability that she gets at least 6 of the 10 multiple choice questions correct? c.) If the multiple choice questions had 5 choices for answers instead of 4,...
4. A student is taking a multiple-choice quiz where each question has four choices. The student randomly guesses the answers to the five-question quiz. What is the probability that the student gets all of the questions correct? (TEKS G.13.E) 1 (В A 256 1024 - D 5 16
QUESTION 14
QUESTION 14 Find the indicated binomial probability. Round to five decimal places when necessary. A multiple choice test has 30 questions, and each has four possible answers, of which one is correct. If a student guesses on every question, find the probability of getting exactly 12 correct.
5) A student takes a multiple choice test with 12 questions, Each question has 4 possible answers only one of which is correct. .If this student guesses on all of the questions what is the probability he gets exactly three correct answers? A) 0.1974 C) 0.2323 B) 0.2825 D) 0.2581 E) 0.1105
Question 7 (4 points) A student takes a multiple choice test consisting of 5 questions where there are 4 choices per question. Also, each question is worth 20 points. Suppose the student guesses on each question. Let X be the number of questions the student gets correct. The probability distribution for X is given below. Find the probability that the student gets at least a 60 on the test. Give your answer to four decimal places. x10 11 12 13...
7.
a.
b.
c.
Assume that random guesses are made for nine multiple choice questions on an SAT test, so that there are n = 9 trials, each with probability of success (correct) given by p = 0.2. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4. P(X<4)= (Round to four decimal places as needed.) Assume that random guesses are made for 2 multiple-choice questions...
Most questions answered within 3 hours.
-
QUESTION 1 Tamiflu is a drug used to treat influenza. A study
found that Tamiflu reduced...
asked 1 minute ago -
Which of the following would be less likely to be used to
allocate factory overhead when...
asked 7 minutes ago -
Transverse pulses travel with a speed of 195 m/s along a taut
copper wire whose diameter...
asked 5 minutes ago -
Sampling for Engineers Homework question 11.51
Suppose that Y1;Y2;Y3;Y4 denote a random sample from a
Poisson(θ)...
asked 9 minutes ago -
Which of the following is cleaved by regulated intramembrane
proteolysis (RIP)? Select any/all answers that apply....
asked 8 minutes ago -
Random characters You decide to create a program characters.py
that fills a two-dimensional list with random...
asked 21 minutes ago -
What are the major sources of error in your determination of the
molar mass? Select all...
asked 24 minutes ago -
A. Suppose your manager indicates that for a normally
distributed data set you are analyzing, your...
asked 46 minutes ago -
During the month of August, the average temperature of a lake
next to a local college...
asked 27 minutes ago -
Which of these four researchers is most likely to have made Type
1 error
Kim who...
asked 41 minutes ago -
In a performance test, each of two cars takes 8.9 s to
accelerate from rest to...
asked 42 minutes ago -
Sapphire Aerospace operates 52 weeks per year, and its cost of
goods sold last year was...
asked 45 minutes ago