The mean age of 8 women in an office is 30 years old. the mean age of 5 men in an office is 25 years old. what is the mean age (nearest year) of all the people in the office?

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

You can find the constant of proportionality by finding the ratio of

What is the value of x when x + 7 = 21?