400 students were surveyed one week prior to the election for student body president regarding their choice of three candidates. The table below shows the results of the survey
candidate A B C
votes 250 116 34
a) There are 2400 students in the school. According to the survey about how many votes can each candidate expect to receive?
b) Assume the survey has a 4% margin of error. Estimate an interval for the number of votes expected to go for Candidate A.