a lot of 75 washers contains 5 in which the variability in thickness around the circumference of the washer is unaceptable. A sample of 10 washers is selected at random, without replacement. What is the probability that none of the unacceptable washer is in the sample?

please answer the question in the photo! thank you :)

how do you find the simple random sample of 15 restaurants?

An experiment consists in asking 8 people whether they have a college degree, and counting the number of people who answer they do have one. List all the possible values of the random variable associated to this experiment.

In order to estimate the length of wolves in a forest, 12 wolves are selected to be studied by some researches. The lengths of the wolves, in feet, are 6.1, 4.94, 5.89, 5.3, 4.81, 5.73, 5.35, 6.07, 4.87, 6.17, 4.12, 4.26. Find the variance of the lengths of the selected wolves. Round your answer to four decimal places.

When making random guesses on an 8 question quiz the probability of guessing correctly on any one question is 0.2.  What is the probability of guessing correctly on at least one question?

A university study involves a simple random sample of 26 students taken from a population of​ 12,550. Undergraduate students make up 73​% of the​ university's students. Determine the probability of selecting only undergraduate​ students?

According to the historical data, the life expectancy in Argentina is equal to the life expectancy in Bolivia. A new study has been made to see whether this has changed. Records of 225 According to the historical data, the life expectancy in Argentina is equal to the life expectancy in Bolivia. A new study has been made to see whether this has changed. Records of 225 individuals from argentina who died recently are selected at random. The 225 individuals lived an average of 77.4 years with a standard deviation of 6.7 years. Records of 300 individuals from Ireland who died recently are selected at random and independently. The 300 individuals lived a mean of 76.5 years with a standard deviation of 5.3 years. Assume that the population standard deviations of lifetimes in these two countries can be estimated by the sample standard deviations, as the samples used were quite large. Construct a 90% confidence interval for , the difference between the life expectancy in the United States and…

An exam consists of twenty multiple-choice questions. Each question has five different possible answers, only one of which is correct. A person randomly guesses on each question. What isthe variance of the number of questions that are correct?

Suppose the proportion of the people who are married in the population is about 0.54 and consider the following experiment in which a researcher chooses at random 5 people from the population with replacement, recording each individual's marital status.  Let the random variable, y, denote the number of people chosen who are married.  Please answer the following: How many ways are there to draw exactly 3 married people in this experiment? On average, how many married individuals would be chosen? What is the probability of selecting one or fewer married people in this experment?