Atotal of 100 students play on the sports academy’s soccer, track, or basketball teams. no student plays on more than one team. 61 of the students are boys. there are 36 students on soccer teams, 19 are on the girls’ soccer team. there are 35 students on basketball teams, 18 are on the boys’ basketball team. how many boys are on the track team?

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.