The following are amounts of total snow falls (in inches) in different Midwestern cities in the United States in a certain year: 20 40 31 7 15 29 25 20 17 32 28 12 34 29 20 17 33 23 Find the sample mean (it is an integer).

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?