A student takes a multiple-choice exam with 15 questions, where each questions have five possibleselections and the probability to answer correctly is 1/4. Suppose that the student was unable tofind time to study for the exam and just guesses at each question.a)Find the probability that the student gets at least 5 questions correct.b)Assume that the student is very lucky, find the probability the student will get an B (withmarks at least 60%).c)In the same exam, another student fell asleep and wakes up with 5 minutes left in the exam.What is the probability that the first question the student get right is the 5th question?d)Suppose the teacher changed the question format and to pass the exam, students need toanswer 6 questions correctly. what is the probability that a student answer 10 questionscorrectly?

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Answered: A student takes a multiple-choice exam…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Kelly realized that 4% of his students' exams have academic integrity issues. He plans to go through the exams at random to find one with academic integrity issues. Let X be the number of exams Kelly selects until he finds one with academic integrity issues. a) Find the probability that the 18 th exam Kelly selects will be the first with academic integrity issues. State your answer as a percentage rounded your answer to 2 decimal places. b) What is the probability of finding an exam with academic integrity issues within the first 5 exams? Round your answer to 3 decimal places.
A local county has an unemployment rate of 6%. A random sample of 16 employable people are picked at random from the county and are asked if they are employed. Round answers to 4 decimal places. a) Find the probability that exactly 4 in the sample are unemployed. b) Find the probability that there are fewer than 3 in the sample are unemployed. c) Find the probability that there are more than 2 in the sample are unemployed. d) Find the probability that there are at most 3 in the sample are unemployed.
Assume this year's flu vaccine has a 80% chance of being effective. If the vaccine is given to 333 randomly selected people, answer the following. d) What is the probability that exactly 264 of them did not get the flu? Round final answer to 4 decimal places. e) What is the probability that less than 264 of them did not get the flu? Round final answer to 4 decimal places. f) What is the probability that more than 264 of them did not get the flu? Round final answer to 4 decimal places.
Assume that the probability of getting a job that you applied for is 19%. Give all answers to at least 3 decimal places. a) What is the average number of jobs you need to apply to, before you get one job offer? b )If you have a criminal record, then your probability of getting a job that you applied for is 1/5 of your probability of getting a job without a criminal record. What is the average number of jobs you need to apply to, before you get one job offer if you have a criminal record?
Find values of n, x, p and q. DO NOT SOLVE based on American Chemicsl Society, there is a 0.9 probability that in the United States, a randomly selected dollar bill is tainted with traces of cocaine. Assume 8 dollar bills are randomly selected. Find the probability that at least 5 of them have traces of cocaine
Three dice were rolled. Find the probability of getting a number less than 10 if it is known that the resulting dots per dice is less than 5.
Exam consists of 20 questions, each question has four options. If the answer of one of the students randomly. What is the probability that he ?will pass the exam 0.334 O 0.4456 O 0.01 O 0.652 O
2. On average, a saleslady in a department store spends with her customer is 4 minutes. a) Find the probability that the saleslady spends more than 3 minutes with a customer? b) Find the probability that the saleslady spends between 4 to 5 minutes with a customer?
In the statistics, there 20 Malays, x Indians and 10 Chinese's students in a seminar and find the probability of choose a Malay student is 9
Suppose that you were challenged by a friend to hit the bull's eye of a circular board with two concentric circles namely the inner and the outer circles. Your probability of hitting a bull's eye from a distance is 0.05, the probability of hitting the outer circle is 0.75, and the probability of hitting the inner circle is 0.15. If you hit the bull's eye, he will give you 500 pesos. Hitting the inner circle will merit you 300 pesos and the outer circle, 100 pesos. How much is your expected winning? Select the correct response: 265 pesos none of these 95 pesos 145 pesos 335 pesos

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