Question

Jimmy uses his time to watch ducks. The time it takes to between ducks is exponentially distributed with mean 20 minutes.

1) He wakes up at 10 AN and begins watching ducks. What us the probability that it takes more than 20 minutes before a bus passes?

2) What is the probability that exactly 2 ducks pass by in the first hour.

3.) What is the expected number of ducks that pass by during 10 hours?

Answer 1