Galen soul tickets for his church is Carnaval for a total of 2820 children’s tickets cost three dollars each and adult tickets cost five dollars each the number of children’s tickets sold was three more than three times the number of adult tickets sold how many children’s tickets in how many adult tickets did the sell

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.