A class used cars and vans to go on a field trip because all of the buses were already in use. They used 9 vehicles to go on the trip. Each car holds 3 students and each van holds 13 students. If 97 students went on the trip, then how many of each type of vehicle did the class use?

A. the probability that a product is defective is 0.1. what is the probability that there will be 1 or less defective products out of the next 8 produced products b. the expected number of imperfections in the coating nylon for parachutes is 6 per 100 yards. what is the probability of finding 12 or fewer imperfections in 260 yards c. in a lot of 54 products there are 9 defective products. calculate the probability that not more than 1 is defective from a random sample of 17 products.