Audrey sanders sells closet organization systems. she is paid
a commission of 5.14% of her first $1,500 in sales during the
week and 10% on all sales over $1,500. what is her commission
in a week during which she sells $7,500 worth of closet
organization systems?

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?