The probability of a bolt being faulty is 0.3. Find the probability that in a random sample of 20 bolts there are exactly 2 faulty bolts. 0.0278 0.0746 0.1304 0.1244
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- ssume that 33.2% of people have sleepwalked. Assume that in a random sample of 1454 adults, 523 have sleepwalked. a. Assuming that the rate of 33.2% is correct, find the probability that 523 or more of the 1454 adults have sleepwalked. b. Is that result of 523 or more significantly high?At a restaurant, the probability that a customer will order a nonalcohlic drink is .56. Find the probability that in a sample of 15 customers, none of the 15 will order a non alcoholic drink11.6% of the population is 65 or older. Find the probability that the following number of persons selected at random from 50 people are 65 or older. The probability that at least 3 are 65 or older is (Round to three decimal places as needed.)
- Suppose that six cups of yogurt are selected at random. What is the probability that at least three cups have at least 11.5 g of protein? Give your answer to at least three decimal places. The variable Y represents the number of cups out of the six randomly‑selected cups that contain at least 11.5 g of protein? The probabilty of at least 11.5 g of protein in a cup is 0.70.Based on the survey assume that 49% of consumers are comfortable having drones deliver their purchases. Suppose that we want to find the probability that 5 consumers are randomly selected exactly 2 of them are comfortable with delivery by drones. Indemnify values of n, x, p, and q.ion 16.84. An urn contains 3 one-rupee coins, 5 fifty paise coins and 12 ten-paise coins. If a coin is drawn at random, find the expected value of the draw, assuming that all coins are equally likely.
- An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 119 cm and a standard deviation of 5.7 cm. A. Find the probability that one selected subcomponent is longer than 121 cm. Probability = B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 121 cm. Probability = C. Find the probability that if 4 are randomly selected, all 4 have lengths that exceed 121 cm. Probability =The number of students who fail per semester is often modeled as a Poisson random variable. Assume that on the average there are 5 students who fail per sem. a. What is the probability that there are exactly 5 students who fail in 1 sem? b. What is the probability that there are exactly 2 students in one academic year? c. What is the probability that there are at least 2 students who fail in one sem?The probability that a machine develops a fault within the first 3 years of use is 0.003. If 40 machines are selected at random, the probability that 38 or more will not develop any faults within the first 3 years of use is ....
- The number of hits on a website follows a Poisson process with a rate of 3 per minute. The probability that more than a minute goes by without a hit is 0.0498. If 2 minutes have gone by without a hit, what is the probability that a hit will occur in the next minute? O 0.9502 O 0.3004 O 0.0996 O 0.7410Suppose that 65% of people own dogs. If you pick two people at random, what is the probability that they both own a dog? Give your answer as a decimal (to at least 3 places) or fraction