A school newspaper reporter decides to randomly survey 20 students to see if they will attend Tet festivities this year. Based upon past years, she knows that 17% of students attend Tet festivities. We are interested in number of students who will attend the festivities.
a) Find the probability that at most 4 students will attend. (Round your answer to four decimal places.)
b) Find the probability that more than 3 students will attend. (Round your answer to four decimal places.)
c) How many of the 20 students do we expect to attend the festivities? (Round your answer to the nearest whole number.)