Presidential job approval is the most-watched statistic in American politics. According to the June 2010 NBC/wall Street Journal public opinion poll, President Barack Obama has reached his lowest approval rating since taking office in January of 2009. The poll showed that 48% of people disapprove of the job Obama is doing as President of the United States, while only 45% approve. Experts attribute the drop in approval ratings to a poor economy and the government's reaction to the massive oil spill in the Gulf of Mexico. Assume the above approval and disapproval ratings in June 2010 to answer the following questions.

a. What is the probability that President Obama gets a majority support in a random sample of 50 Americans?

b. What is the probability that President Obama gets a majority disapproval in a random sample of 50 Americans? L056