Q. The probability is 1 in $4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average US driver takes 50,000 trips. Illustrate what is the probability of a fatal accident over a lifetime? Explain your reasoning. Suppose independent events. Explain why might the assumption of independence be violated? Explain why a driver might be tempted not to use a seat belt "just on this trip?"