A class with n kids lines up for recess. The order in which the kids line up is random with eachordering being equally likely. There are two kids in the class named Betty and Mary. The use of theword “or” in the description of the events, should be interpreted as the inclusive or. That is “A or B”means thatAis true, Bis true, or bothAandBare true. What is the probability that Betty is first in line or Mary is last in line as a function ofn? Sim-plify your final expression as much as possible and include an explanation of how you calculated thisprobability

Answer this question! 30 points and brainliest! only if you know the answer.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?