### 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.