a. To find the probability that a family does not have a car, we can use the complement rule. The probability that a family does not have a car is equal to 1 minus the probability that the family has a car. Probability that a family does not have a car = 1 - 0.61 = 0.39 Therefore, the probability that a family does not have a car is 0.39. b. To find the probability that a family has at least one of a car or a bike, we can calculate the complement of the probability that the family does