According to Federal Highway Administration 2007 statistics, the percent of licensed female drivers has just surpassed the

Question:

According to Federal Highway Administration 2007 statistics, the percent of licensed female drivers has just surpassed the percent of licensed male drivers. Of the drivers in the United States, 50.2% are females. If a random sample of 50 drivers is to be selected for a survey,
a. what is the probability that no more than half (25) of the drivers are female?
b. what is the probability that at least three-fourths (38) of the drivers are female?