I need assistance with the following problems:
A certain airplane has two independent alternators to provide electrical power. The probability
that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will
fail? (b) Neither will fail? (c) One or the other will fail? Show all steps carefully.
Mr F says: Drawing a tree diagram is a simple approach to take.
Problem # 2
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 U.S. driver takes 50,000 trips. (a) What is the probability of
a fatal accident over a lifetime? Explain your reasoning carefully.
Hint: Assume independent
events. Why might the assumption of independence be violated? (b) Why might a driver betempted not to use a seat belt “just on this trip”?
Read this thread: http://www.mathhelpforum.com/math-he...obability.html