In a test for ESP (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a

Question

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 is the value of n? (Enter your answer as a whole number.)
n=
What is the value of p? (Enter your answer rounded to two decimal places.)
P=

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