Find the indicated probabilities using the geometric
distribution, the Poisson distribution, or the binomial
distribution. Then determine if the events are unusual. If
convenient, use the appropriate probability table or technology to
find the probabilities. Assume the probability that you will make a
sale on any given telephone call is 0.15. Find the probability that
you (a) make your first sale on the fifth call, (b) make your
sale on the first, second, or third call, and (c) do not...