Please give me the correct answer. Only answer if you're very good at math.​

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

Suppose your sat score is 2040. a college with an average sat score for admintted students of which of these would most likely be your best option?

Which of the following statements is a true conclusion that can be made from the scaled bargraph?