# Math Help - Probabilty again. Help!

1. ## Probabilty again. Help!

The probability is 1 in 4,000,000 that a single auto trip in the U.S. 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?

2. Originally Posted by tysupplyguy
The probability is 1 in 4,000,000 that a single auto trip in the U.S. 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?
$P(\text{accident in lifetime}) = E[\text{trips in lifetime}]*P(\text{accident})$

3. Thanks so much for your help.