Suppose occurrences of sales on a small​ company's website are well modeled by a Poisson model with λ = 7/hour.
Complete parts a and b below.
a) If a sale just​ occurred, what is the expected waiting time until the next​ sale?
The expected waiting time is one seventh1/7 hour.
​(Type an integer or a​ fraction.)
​b) What is the probability that the next sale will happen in the next 10 ​minutes?
The probability is?