Abag contains 4 red balls, 2 green balls, 3 yellow balls, and 5 blue balls. find each probability of randomly removing balls with replacement. removing a blue, a green, a green, and a yellow

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?