stats

A multiple choice test consists of four questions. Each question has five possible answers of which
only one is correct. A student guesses on every question. Find the probability distribution of X, the
number of questions she answers correctly.

A) x P(X = x)
0 0
1 0.2
2 0.04
3 0.008
4 0.0016

B) x P(X = x)
0 0.4096
1 0.4096
2 0.1536
3 0.0256
4 0.0016

C) x P(X = x)
0 0.4096
1 0.4096
2 0.1024
3 0.0768
4 0.0016

D) x P(X = x)
1 0.4096
2 0.1536
3 0.0256
4 0.0016

First Name

Similar Questions

1. Statistics Algebra 2

A 10-question multiple choice test has 4 possible answers for each question. A student guesses on all ten answer. a)What is the probability that the student selects at least 6 correct answers? b)Is getting exactly 10 questions
2. Binomial Distribution

A biology quiz consists of twelve multiple-choice questions. Eight must be answered correctly to receive a passing grade. If each question has five possible answers, of which only one is correct, what is the probability that a
3. stat probability

A multiple choice quiz consists of 20 questions, each with 3 possible equally likely answers. If a student guesses at the answer to each question, then the mean number of correct answers selected by the student is?
4. Math

10 multiple choice questions each with three possible answers only one of which is correct. A student guesses the answer to every question. (a)What is the probability that the student will answer the first six questions correctly
5. stats

a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will
6. statistics

Bill has completed a 10-question multiple-choice test on which he answered 7 questions correctly. Each question had one correct answer to be chosen from five alternatives. Bill says that he answered the test by randomly guessing
7. LBCC

A multiple choice quiz consists of 20 questions, each with 3 possible equally likely answers. If a student guesses at the answer to each question, then the mean number of correct answers selected by the student is?
8. Statistics

A multiple choice test consists of 60 questions. Each question has 4 possible answers of which one is correct. If all answers are random guesses, estimate the probability of getting at least 20% correct? Trouble with deciding p,
9. Finite Math

A biology quiz consists of 10 multiple -choice questions. 7 must be answered correctly to receive a passing grade. If each question has 4 possible answers, of which only one is correct, what is the probability that a student who
10. statistics

A multiple choice test has 20 questions with each having 4 possible answers with one correct. Assume a student randomly guesses the answer to every question. 1) What is the probability of getting exactly 9 correct answers? 2)What

More Similar Questions