Statistics released by the National Highway Trafc Safety Administration and the National Safety Council show that on an average weekend night, 1 out of every 7 drivers on the road is drunk. If 300 drivers are randomly checked next Saturday night, what is the probability that the number of drunk drivers will be (i) less than & (ii) more than 49 (iii) at least 35 but less than 47+ (use normal approximation)