118 The maternity ward at a hospital in the Philippines is one of the busiest in the world with an average of 60 births per day Let X the number of births in an hour a Find the mean and standard deviation of X b Sketch a graph of the probability distribution of X c What is the probability that the maternity ward will deliver three babies in one hour d What is the probability that the maternity ward will deliver at most three babies in one hour e What is the probability that the maternity ward will deliver more than five babies in one hour up that 3 percent of its bulbs are defective Using both the