The average adult men the average weight of adult men is 183 pounds with a standard deviation of 41 pounds. thirty men were asked their weight and the mean was calculated to be 180, test the hypothesis that the mean is not 183 pounds using a=.05

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?