A store is having a sale on trail mix and jelly beans. For 2 pounds of trail mix and 5 pounds of jelly beans, the total cost is $12. For 8 pounds of trail mix and 3 pounds of jelly beans, the total cost is $31. Find the cost for each pound of trail mix and each pound of jelly beans.

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem