In a bag of keys, there are 12 silver keys, 5 black keys, 10 copper keys, and 3 painted keys of various colors. one key is drawn out at random. what is the probability that the key that is drawn is silver or copper?

Use the sample data and confidence level given below to complete parts a through d.a research institute poll asked respondents if they felt vulnerable to identity theft. in the poll, n=1090 and x=549 who said yes. use a 99% confidecne level.a. find the best point of estimate of the population of portion p.b. identify the value of the margin of error e.e= round to four decimal places as needed.c. construct the confidence interval._ < p < _ round to three decimal places.d. write a statement that correctly interprets the confidence interval.