A10 member club is getting ready to select a president and a secretary assuming that the same person cannot hold each job how many ways can the offices be filled

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

Evaluate cos2θ for cosθ = square root of 3/2

Solve the inequality and graph 6j - 7 < 5