The distribution for the size of families in one U.S. city is shown below.         Size      Proportion        2             0.422       3             0.234       4             0.205       5             0.088       6             0.032       7+           0.019 A family is selected at random. Find the probability that the size of the family is at least 3.

If the probability that a professor correctly writes a slide is 0.80, what is the probability that at least 6 out of 8 slides are correct? Round your answer to two decimal places. Write your answer as a fraction not as a percentage (i.e. write as 0.38 not as 38%).

Solve the problem.Suppose the candidate pool for two appointed positions includes 10 women and 5 men. All candidates were told that the positions were randomly filled. Find the probability that two men are selected to fill the appointed positions. Select one: A. 0.095238 B. 0.238095 C. 0.428571 D. 0.133333

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Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 653. A random sample of 34 years is selected from this population. What is the probability that the mean gain for the sample was between 400 and 800? Assume o = 1540. The probability is (Round to four decimal places as needed.) Interpret the result. Select the correct choice and fill in the answer box to complete your choice. (Round to two decimal places as needed.) O A. About OB. About OC. About OD. About % of samples of 46 years will have an annual mean gain between 400 and 800. % of samples of 34 years will have an annual mean gain between 653 and 800. % of samples of 34 years will have an annual mean gain between 400 and 800. % of sampl of 34 years will have an annual mean gain between 400 and 653.

After giving a test to a group of students, below is the summary of grades and gender. A Male 15 Female 18 B C Total 7 13 35 49 Total 33 24 27 If a student was randomly chosen, find the probability that the student earned an A. Enter as a fraction or round your answer to four decimal places. Question Help: Video Submit Question

Submit your answer as an exact fraction or a decimal rounded to the hundredths place. Cupcakes are being randomly passed out to every student in the class. The assortment of cupcakes is described in the table below. What is the probability of receiving a cupcake that is not vanilla flavored? Cupcake flavor Number of cupcakes Vanilla 7 Mint chocolate 3 Red velvet 4 Carrot Cake 6

The probability that a house in an urban area will be burglarized is 5%. If 20 houses are randomly selected, what is the mean of the number of houses burglarized? O A. 0.5 OB. 10 O C. 1 O D. 1.5 C

A marketing company has randomly surveyed 210 men who watch professional sports. The men were separated according to their educational level (college degree or not) and whether they preferred the NBA or the National Football League (NFL). The results of the survey are shown to the right. Complete parts a through d. a. What is the probability that a randomly selected survey participant prefers the NFL? 0.5286 (Round to four decimal places as needed.) b. What is the probability that randomly selected survey participant has a college degree and prefers the NBA? 0.1857 (Round to four decimal places as needed.) c. Suppose a survey participant is randomly selected and you are told that he has a college degree. What is the probability that this man prefers the NFL? (Round to four decimal places as needed.) C Sports Preference NBA NFL College No College Degree 39 13 Degree 60 98