Adoctor charges $75 consultation fee plus $50 per hour. another doctor charges $50 consultant fee plus $60 per hour

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Solve 2x+y=3 x+y=5 in substitution method

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