A part of a promotion, students who participate in a survey are mail 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 each type of pass has an equal chance of being given out, we can calculate the expected number of passes for each activity by dividing the total number of participants by the total number of activities.
There are three activities: movies, roller skating, and bowling.
So, we divide the 900 participants by 3 activities:
900 / 3 = 300
Therefore, we would expect 300 students to receive a pass for roller skating.