For After-Hours Emergencies, Doctors Often Use a Messaging/paging Service to Allow

Multiple Choice

For after-hours emergencies, doctors often use a messaging/paging service to allow patients to contact them.If it is known that 30% of the patients who call the messaging service fail to leave a message for the doctor, what is the probability that out of 80 randomly sampled calls, more than 30 will fail to leave a message?

A) 0.0512
B) 0.9279
C) 0.3750
D) 0.0721