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P:00-CHINESE GR 5.
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9xbuddy : Sim
17 Test - *Corrections
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7. Pedro and Juan bought a pizza for $12.60 and two
drinks for $1.50 each. They had a coupon for $1.00
off their meal. They split the remaining cost
equally. Which expression could be used to find the
amount each person paid?

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?