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Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 85 people in the 18-21 age bracket and finds that 72 of them respond and 13 refuse to respond. When 289 people in the 22-29 age bracket are contacted, 263 respond and 26 refuse to respond. Assume that 1 of the 374 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who responds. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the symbol. P(22-29 or responds) - (Hint: It might be helpful to organize the data into a table first.)
A quick quiz consists of a multiple-choice question with 5 possible answers followed by a multiple-choice question with 4 possible answers. If both questions are answered with random guesses, find the probability that both responses are correct. Report the answer as a percent rounded to two decimal place accuracy. You need not enter the "%" symbol. Probability-
A dice is rolled 2 times. What is the probability of showing a 5 on every roll? (Round to 4 decimal places)
Katherine buys a bag of cookies that contains 8 chocolate chip cookies, 9 peanut butter cookies, 6 sugar cookies and 9 oatmeal raisin cookies. What is the probability that Katherine randomly selects a sugar cookie from the bag, eats it, then randomly selects another sugar cookie? (Round your answer to 4 decimal places.)
A hacker is trying to guess someone's password. The hacker knows (somehow) that the password is 3 digits long, and that each digit could be a number between 0 and 4. Assume that the hacker makes random guesses. What is the probability that the hacker guesses the password on his first try? Round to six decimal places. Probability-
A special deck of cards has 10 green cards, 12 blue cards, and 5 red cards. When a card is picked, the color is recorded. An experiment consists of first picking a card and then tossing a coin. a. How many elements are there in the sample space? b. Let A be the event that a green card is picked first, followed by landing a head on the coin toss. P(A) - Round your answer to 4 decimal places. c. Let B be the event that a red or blue is picked, followed by landing a head on the coin toss. Are the events A and B mutually exclusive? O No, they are not Mutually Exclusive O Yes, they are Mutually Exclusive d. Let C be the event that a green or blue is picked, followed by landing a head on the coin toss. Are the events A and C mutually exclusive? OYes, they are Mutually Exclusive No, they are not Mutually Exclusive
A and B are independent events. Use the following probabilities to answer the question. Round to 4 decimal places. P(A)-0.57, P(A and B)-0.34, find P(B) P(B) -