In a February 2005 poll conducted by Salary.com, firefighters hosed down the competition and won the title of “sexiest job,” with 16% of the votes. Suppose you randomly selected 50 adults. Use the normal approximation to the binomial distribution to find the probability that from within your collection:

Source: http://salary.com/careers/layoutscripts/crel_display

.asp?tab=cre&cat=nocat&ser=Ser348&part=Par516

a. More than 12 of the adults pick firefighter as the sexiest job.

b. Less than 8 of the adults pick firefighter as the sexiest job.

c. From 7 to 14 of the adults pick firefighter as the sexiest job.