Assume that random guesses are made for 7 ​multiple-choice questions on a test with 5 choices for each​ question, so that there are n=7 ​trials, each with probability of success​ (correct) given by p=0.20. Find the probability of no correct answers.

Q: A kindergarten class consists of 14 boys and 11 girls If the teacher selects a random sample of n =…

A: Given that there are 14 boys and 11 girls. So total (14+11)=25 students. If 2 boys are picked, then…

Q: multiple-choice examination has 50 questions, each with five possible answers, only one of which is…

A: Sample  size(n)=50p=probability of correct answer=q=probability of incorrect answers=A random…

Q: On a single toss of a fair coin, the probability of heads is .5 and the probability of tails is 0.5.…

A: The probability of heads is 0.5 and the probability of tail is 0.5.

Q: In a large population, 61 % of the people have been vaccinated. If 3 people are randomly selected,…

A: p(vaccinated) = p = 0.61 ∴ p(not vaccinated) = 1 - 0.61 = 0.39 select 3 people at random p(atleast…

Q: In a large population, 56 % of the people have been vaccinated. If 5 people are randomly selected,…

A: given data, p( vaccinated)=p =0.56n=5q=1-p=1-0.56=0.44x= no. of vaccinated

Q: Ratio of probability of 3 successes in 5 independent trials to the probability of 2 successes in 5…

A:

Q: SITUATION S A musical CD collection is composed of 5 jaz CDs 2 classical CDs, and 3 rock CDs. Four…

A: A musical CD collection is composed of jazz CDs 2 classical CDs, and 3 rock CDs. Four CDs are to be…

Q: A group of people were asked if statistics teachers know the true meaning of life. 338 responded…

A: Given data No of people who thinks, statistics teachers know the true meaning of life = 338 No of…

Q: The probability that a student is awarded a pass in Engineering statistics is 0.75. Find the…

A: Solution: Let X be the number of students pass the statistics examination and n be the sample number…

Q: In a large population, 53 % of the people have been vaccinated. If 4 people are randomly selected,…

A: Given information- Given problem is of binomial distribution. Probability of success, p = 0.53 No.…

Q: probability of getting a total score of 15

A: We have to find out the probability of getting a total of 15.

Q: calculate the probability of exactly 3 successes in 4 tries. p= 0.2

A: Given:n = 4, r= 3, p = 0.2Consider that the random variable X follows a binomial distribution with…

Q: Suppose​ 12% of Americans smoke. If we randomly select 10​ Americans, what is the probability that…

A: Consider X is a random variable that follows binomial distribution with the sample size, n equals to…

Q: A health instructor surveyed all his students, and tallied the results. The first survey questior…

A: The total number of students is 1+6+5+6=18.

Q: Thirty-five percent of the people who own cellphones use their phones to send and receive text…

A: Formula : Binomial distribution is given by

Q: Seventeen percent of married couples say they are planning a trip to Europe. You randomly select 15…

A: Suppose a random variable x, defines the number of married couples, who are planning a trip to…

Q: A test consists of 10 multiple choice questions, each with five possible answers, one of which is…

A: Obtain the probability that that the student will get at most 8 answers correctly. The probability…

Q: The proportion of eligible voters in the next election who will vote for the incumbent is assumed to…

A: Solution: From the given information, n = 410 and p = 0.527.

Q: A quiz consists of 20 multiple-choice questions, each with 5 possible answers. For someone who makes…

A:

Q: Suppose that 60% of people own dogs. If you pick two people at random, what is the probability that…

A: We are given that 60% of the people's own dogs, if you choose a random person, the probability that…

Q: In a large population, 16% of the people are left-handed. In a random sample of 5 people, determine…

A:

Q: Students will be chosen at random for school spirit awards. There are 6 athletes and 8 non-athletes…

A: GivenNo.of athletes = 6No.of Non athletes = 8Total of students = 6+8=14No.of prizes = 2

Q: An experiment is run.It succeeds thrice as often as it fails.Find the probability of exactly 4…

A:

Q: The probability of winning a game of chance is 0.39. Find the probability of winning the game for…

A:

Q: Comment on the shape of the distribution. I

A: Given Information:

Q: The probability of getting malaria after a mosquito bite is 32%. Eight friends go  hiking and all…

A: Suppose a random variable x, defines that the number of friends, who got malaria.