A piece of drill rod 2 ft 6 in. long is to be cut into pins, each 2 1/2 in. long. A. Assume no loss in each cut. How many pins will you get?

B. Assume 1/16 in. waste in each cut. How many pins will you get?

Please explain how you got your answer for both A and B.
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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