### Home > CCG > Chapter Ch10 > Lesson 10.3.2 > Problem 10-131

A survey of local car dealers revealed that

What is the probability one of these cars selected at random had neither Green Fang nor an alarm system?

Make a Venn diagram or two-way table.

What is the probability that a car had Green Fang and was not protected by an alarm system?

Use the percentage of cars that have Green Fang and the percentage of cars that have both Green Fang

and an alarm to find out the percentage of cars with only Green Fang.Are having Green Fang and an alarm system disjoint (mutually exclusive) events?

No, because

of the cars had both systems. Use the alternative definition of independence (see the Math Notes box in Lesson 10.2.3) to determine if having Green Fang is associated with having an alarm.