Which of the following fraction pairs is equivalent? 16/20 and 20/35 6/21 and 8/20 8/24 and 8/20 2/6 and 7/21

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

What is the upper quartile in the box plot?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)