A pizza restaurant received a delivery of 40 packages of cheese and 20 packages of
pepperoni. The total ounces of cheese are 400
more than the total ounces of pepperoni. Each
package of cheese has 4 ounces more than a
package of pepperoni. Which system of
equations can determine c, the number of
ounces in a package of cheese, and p, the
number of ounces in a package of pepperoni?

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?