President Reagan was interested in establishing a “defensive wall” to blunt the threat of a nuclear missile attack against this country. The plan was commonly known as “Star Wars.” Assume a defense contractor comes up with two defense systems. System A will destroy 60 % of the missiles launched against this country, but 40 % of the missiles will get through. System B has a 60 %

probability of destroying all the missiles launched but a 40 % chance of letting all the missiles get through. Should you use the expected value approach to choose which system to support? Make your choice using common sense.