Use U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10), A = {1, 2, 4), B = {4, 5, 7, 8), and C = {2, 4, 8} to find the given set. AUB
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Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. ĀUB = {
(Use a comma to separate answers as needed.)
OB. The solution is the empty set.

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?