Question

You own a coffee shop and sell a light and a dark roast. Assume your customers order coffee independently of one another, and the probability of a customer ordering a dark roast coffee is 0.4. Let X be the random number of customers ordering a dark roast coffee of a typical morning rush hour customer count of 75. Compute the following:

A. P(X<=35)

B. P(X>=45)

C. If you are low on dark roast and only brewed enough dark roast to handle 55 customers during the morning rush hour, what's the probability you'll run out of dark roast?

Answer 1