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13-1: Practice Buddy:
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3 Equivalent Fractions: Use
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13.1.IP-10
Question Help
Patricia says the fraction strips show fractions that are
1
equivalent to 5. Explain what you could do to the diagram
to see if she is correct.
1
1
1
1.11

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?