Kerry and Watson are cat groomers. Kerry's workday is 10 hours and Watson's workday is 8 hours. Kerry and Watson each work 40 hours per week.
On Monday, Kerry groomed 15 cats in 10 hours and Watson groomed 10 cats in 8 hours. They each
earn $12.75 for each cat groomed. Assuming that for the rest of the week Kerry and Watson groom
the same number of cats per workday as they did on Monday, what will be the difference between
their weekly earnings?

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?