statistics

posted by erick

A student is taking a multiple choice test where each question have 5 possible answers of which only one is right. If the student knows the answer the student answers correctly, otherwise there is a 20% probability of correct answer. Assume the student knows 70% of the questions.
a. What is the probability of the student answering a question correct?

Similar Questions

1. 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 and …
2. statistics

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly?
3. Math

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly?
4. Math

I need help with the second question: A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly?
5. statistics

10. A student is taking a multiple choice test where each question have 5 possible answers of which only one is right. If the student knows the answer the student answers correctly, otherwise there is a 20% probability of correct answer. …
6. psychology statistics for behavioral sciences

A multiple-choice test has 48 questions, each with four response choices. If a student is simply guessing at the answers, a. What is the probability of guessing correctly for any question?
7. Statistics

A student guesses blindly on a 20-question multiple choice test. If each question has 4 answer choices (only one of which is correct), what is the probability that the student will answer exactly 10 questions correctly?
8. Statistic

A quiz consists of 10 multiple-choice questions. Each question has 5 possible answers and only one of them is correct. A student has not studied for the quiz and will pick his answers randomly. 1)Define the random variable x that will …
9. statistics

A math test consists of 17 multiple choice questions, each with five possible answers (a, b, c, d, e), only one of which is correct. Assume that a student takes the test and randomly answers the questions. What is the probability that …
10. Statistics

An unprepared student is about to take his first test of the semester. He is told that his test will be composed of 20 multiple choice questions, each with 4 possible answers, only one of which is correct. a.What is the probability …

More Similar Questions