1. I need an explanation of the difference between the binomial and the geometric distributions. Think about the number of trials and the number of successes.
2. An athlete is running the 110 m hurdles. There are 10 hurdles. The probability falling at each hurdle is 20%.
3. How many times does he expect to fall?
4. What is the probability he falls three times?
5. A second hurdler decides to keep running until she falls. She has a 15% chance of falling at each hurdle.

1. How many hurdles should she expect to jump before falling?
2. What is the probability she falls on the 8th hurdle?