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Home > INT2 > Chapter 9 > Lesson 9.2.2 > Problem 9-72
A snack cracker company conducted a taste test for the three different types of crackers it makes. It surveyed
Age | Cracker A | Cracker B | Cracker C |
---|---|---|---|
Under 20 | |||
20 to 39 | |||
40 to 59 | |||
60 and over |
What is the probability that a participant chose cracker A or was under
years old? Use the Addition Rule. If the question says 'or' you must subtract the probability of 'and'.
What is the probability that a participant did not choose cracker A and was over
years old? Use a complement to answer this question. To use the complement, reverse the method you used in part (a).
Subtract P(cracker A) and P(Under) from the total. What is the probability that a participant was
years old or older? Use a complement to answer this question. Use the same method from part (b).
A randomly-selected participant says he is
years old. What is the probability that he chose cracker A? Each age group only has
participants.