Use the following for #10-15
A consumer testing group claims that 10% of a certain model of a new car is coming off the assembly line with a significant safety problem, 20% have a minor safety defect, and the remaining 70% are fully safe.
A dealer wants to have 5 cars on hand in his lot that are fully safe.
Conduct a simulation to estimate how many cars the dealer will have to purchase to make sure he has 5 safe cars.