Halla la suma de 42 de la progresión aritmética de diferencia y primer término Halla el término general de la progresión y la suma de 1/2,3/4,4... términos​

The depreciation per unit for a company

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

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list