A part of a promotion, students who participate in a survey are mailed a free pass for one of three activities: movies, roller skating, or bowling. Participants have an equal chance of receiving each type of pass. If 900 students participate, how many would be expected to receive a pass for roller skating?
Since the participants have an equal chance of receiving each type of pass, we can calculate the expected number of students who would receive a pass for roller skating by dividing the total number of participants (900) by the number of activities (3):
900 / 3 = 300
Therefore, we would expect 300 students to receive a pass for roller skating.