You are about to take a multi-day tour through a national park which is famous for its wildlife. The tour guide tells you that on any given day there's a 61% chance that a visitor will see at least one "big game" animal, and a 39% chance they'll see no big game animals; when the tour guide says "big game", he refers to either a moose or a bear. The guide assures you that big game sightings on a single day are independent of any other day's sightings. Given the information from the tour guide, which of the following calculations cannot be performed using a binomial distribution?