Quick! brainliest! explain your answer!

identify the resulting probability as theoretical or experimental. one-half of the people in a chess club are adults 21 years old or older. the other half are younger. what is the probability that a club member chosen at random will be under 21 years old?

a. the experimental probability is 50%.
b. the experimental probability is 75%.
c. the theoretical probability is 75%.
d. the theoretical probability is 50%.

Which fraction below is equivalent to 10/12?

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

The graph shows the distance kerri drives on a trip. what is kerri's speed?