A snack cracker company conducted a taste test for the three different types of crackers it makes. It surveyed
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