Which statements could be used to prove that AABC and AA'B'C' are congruent? A. AB A'B', BC - B'C', and ZA – ZA
B. ZA ZA', ZB ZB', and ZC ZC
C. ZA ZA', AC = A'C', and BC - B'C'
D. AB A'B', ZA ZA', and C. C'

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?