A quiz consists of 20 true-false questions. What is the probability that a student will answer exactly half of the questions correctly by guessing on all 20 questions?

Q: What is the probability of rolling a 3 on a number cube and choosing a heart from a deck of cards?

A: Recall:  P(A and B)=P(A∩B)=P(A)×P(B)

Q: In a candy jar, there are 19 blueberry and 13 cherry gumballs. If you randomly select two gumballs…

A: Given Blueberry 19 Cherry 13

Q: An unprepared student takes a 15 question true-false quiz and guesses at the answer to every…

A: Given Data Probability of success,p = 0.5 Probability of failure,q=(1- 0.5 )= 0.5…

Q: There are 25 red balls, 7 green balls, and 9 white balls in a bag. If you reach into the bag and…

A: Given  There are 25 red balls, 7 green balls, and 9 white balls in a bag   Total ball = 25 + 7 + 9…

Q: suppose you toss a coin 100 times and get 95 heads and five tails. what is the estimated probability…

A: Solution

Q: If the passing grade is 9 correct answers, what is the probability that the student will fail?

A: Since there are 4 possible answers among which one is correct therefore Probability of correct…

Q: You roll a​ six-sided die. What is the probability of rolling a 6 or a number greater than 3? What…

A: We want to find the probability

Q: Suppose the passing grade for a certain true-false quiz, with 10 questions is 80% with each question…

A:

Q: when a coin is tossed

A: A coin is tossed 2 times.

Q: You are pulling from a bag containing 9 blue marbles, 8 black marbles, 8 green marbles, and 3 yellow…

A:

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: Two dice are rolled. What is the probability that the sum of the numbers rolled is either 7 or 8?…

A: Given information  Two dice is rolled  Total outcome = 6 x 6 = 36 S={ (1,1) (1,2) (1,3) (1,4) (1,5)…

Q: You toss a coin 6 times. What is the probability of not having the coin land on heads exactly 4…

A: Given that  Number of times coin tossed (n ) = 6 Assuming it is a fair coin , chance of occurring…

Q: A fair die is rolled four times. A 2 is considered​ "success," while all other outcomes are​…

A:

Q: ability of getting "six" at

A:

Q: Find the probability of 62 or more participants believing life on other planets is plausible

A: From the original problem, It is given that the number of observations are independent with…

Q: A student takes a 20-question, true/false exam and guesses on each question. Find the probability of…

A: Introduction to binomial distribution:Consider a random experiment involving n independent trials,…

Q: Suppose that 54% of people own dogs. If you pick two people at random, what is the probability that…

A: The probability of this event is independent of each other of final probability will be the product…

Q: Suppose you toss a coin 100 times and get 72 heads and 28 tails. Based on these results, what is the…

A: It is given that No. of heads = 72No. of tails = 28No. of trials = 100

Q: suppose the probability a team will win is 0.60. what are the odds in favor of the team winning?…

A: It is given that the probability that a team will win is 0.60.

Q: The probability that a house in an urban area will be burglarized is 6​%. If 47 houses are randomly​…

A:

Q: Five girls and 6 boys on the debate team lined up randomly to walk on stage.  What is the…

A: Given: Number of boys = 6 Number of girls = 5

Q: What’s the probability a random four-digit ZIP code has the property the product of the digits is…

A: Random four-digit ZIP code consist of four digits.Total number of odd digits out of 10 decimal…

Q: What is the probability of having 3 boys given the oldest is a boy?

A: The theory of probability has its origin in the seventeenth century. The king of France who…

Q: Suppose you take a 10 question quiz, with 4 options choices, only one is correct. What is the…

A: Given data:   The total numbers of questions are N=10. The numbers of options for a question are…

Q: If the probability that a randomly chosen college student takes statistics is 0.34, then what is the…

A: The probability that a randomly chosen college student takes statistics is 0.34. The probability…

Q: Suppose one card is drawn randomly from a deck of 52 cards. What is the probability of getting a…

A: Answer: From the given data, Total number of cards in a deck = 52 If one card is drawn randomly,

Q: A die is thrown ten times. What is the probability that the sum of the scores is 27?

A:

Q: a test consists of 10 true/false questions. To pass this test a student must answer at least 7…

A: In this context, X has a Binomial distribution with parameters n = 10 and p = 0.5. Since X is a…

Q: A quiz consists of 10 multiple choice questions, each with 4 answer choices. If a student guesses on…

A: 1)Givensample size(n)=10p=14=0.25           (one correct option from 4 choices)Let "x" be that…

Q: If you flip a coin 10 times, what is the probability of getting at least 5 tails? Express…

A: It is given that:Number of times the coin is tossed : and let x denotes the number of times tail…