15 people wore blue and 24 people wore gray, what ratio of the people who wore blue to the people who wore gray in simplest form?

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

Can someone me with these two circle theorem questions asap?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%