Pollsters are concerned about declining levels of cooperatio

Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 84 people in the 18-21 age bracket and finds that 71 of them respond and 13 refuse to respond. When 292 people in the 22-29 age bracket are contacted, 263 respond and 29 refuse to respond. Assume that 1 of the 376 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who refused to respond. Report the answer as a percent rounded to one decimal place accuracy You need not enter the \"%\" symbol, prob = 0.9 %

Solution

number of people in 22-29 age group = 292

number of people who are not in 22-29 and refused to respond = 13

total number of people = 376

required probability = (292+13)/376 = 81.1 %