If 30% of all students entering a certain university drop out during or at the end of their first year, what is the probability that more than 600 of this year’s entering class of 1800 will drop out during or at the end of their first year?

6.95 According to the Federal Highway Administration, nearly 50% of U.S. drivers are females. Assume a random sample of 50 drivers is to be selected for survey.

a. What is the probability that no more than half

(25) of the drivers will be female?

b. What is the probability that at least threefourths

(38) of the drivers will be female?