Statistics released by the National Highway Traffic Safety Administration and the National Safety Council show that on

Question:

Statistics released by the National Highway Traffic Safety Administration and the National Safety Council show that on an average weekend night, 1 out of every 10 drivers on the road is drunk. If 400 drivers are randomly checked next Saturday night, what is the probability that the number of drunk drivers will be

(a) Less than 32?

(b) More than 49?