pollsters are concerned about declining levels of cooperation among persons cont
ID: 3046206 • Letter: P
Question
pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contact 70 people in the 18 to 20 age bracket and finds that 63 of them respond and 7 refuse to respond. When 261 people in the 22 to 29 age bracket are contacted, 237 respond and 24 refuse to respond. Suppose that one of the 331 people is randomly selected. Find the probability of getting someone in the 22 to 29 age bracket or someone who responded.
P(person is in the 22-29 age bracket or responded)=
please explain how you get the answer I have tried this question 3 times and gotten it wrong
Secure I https/www.mathsL.com/Student/PlayerHomework aspx/homeworkid-470408246¿ionid-11; fushed-falke&cid; 4901509center Math 1530 Cassidy Bailey 1 2/18/18 12:51 PM Homework: Homework Section 4.3 Save core: 0 of 1 pt 140120 (14 complete) HW Score: 65%, 13 of 20 pt 4.3.29 Question Help * Pollsters are concerned about declining levels of cooperation among persons contacted in suveys. A pollster contacts 70 people in the 18-21 age bracket and finds that 63 of them respond and I refuse to respond When 261 people in the 22-29 age bracket are contacted 237 respond and 24 refuse to respond Suppose that one of the 331 people is randomly selected Find the probability of getting someone in the 22-29 age bracket or someone who responded P(person is in the 22-29 age bracket or responded) Do not round until the final answer Then round to three decimal piaces as needed] Enter your answer in the answer box and then click check Answer Question 17 (01)Explanation / Answer
Number of people who responded (A) = 63 + 237 = 300
Number of people in 22-29 age bracket (B) = 237 + 24 = 261
Number of people in 22-29 age bracket who responded (A and B) = 237
N(person is in the 22-29 age bracket or responded) = A + B - A and B = 300 + 261 - 237 = 324
P(person is in the 22-29 age bracket or responded) = 324 / 331 = 0.979
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