Assume you have a green and a black wallet. The green wallet contains 6 pennies and 4 dimes. The black wallet contains 8 pennies and 2 dimes. Which wallet were you more likely to have picked if you pulled a dime followed by two pennies from it? Based on past experience, you use the green wallet 4 times more often than the black one.

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?