Which statements are true about the solution of 15 greater-than-or-equal-to 22 + x? Select three options.
A. x greater-than-or-equal-to negative 7
B. x less-than-or-equal-to negative 7
C. The graph has a closed circle.
D. –6 is part of the solution.
E. –7 is part of the solution.

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?