Question: Statistics released by a reputable traffic safety organization show that on an average weekendnight, 1 out of every 10 drivers on the road is drunk.

Statistics released by a reputable traffic safety organization show that on an average weekendnight, 1 out of every 10 drivers on the road is drunk. If 450 drivers are randomly checked next Saturdaynight, what is the probability that the number of drunk drivers will be

(a) less than 31?

(b) more than 63?

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