Nikki Grows 20 Tomato plants. She measures their heights to the nearest centimetre, and writes them down

List the 10 possible samples (without replacement) of size 3 3 that can be obtained from the population of five officials.

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

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.