A group of adults and children were attending a play. A total of 13 people went and spent a total of $72.50. Each adult ticket cost $7.50, and each child ticket cost $5. How many adults attended?
ОА 3
OB 6
Ос 7
OD 10

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?