If 5 people fill out this question, in which 2 people to choose 3, 1 people select 4, 2 people to choose 5. then we can calculate the average number of questions.
If there are five people fill out this problem, two individuals selected 3, 4, 1 personal choice of individual choice 5. Then we can calculate the average of this subject.
If there are 5 people to fill in this problem, 2 of them chose 3, 1 people choose 4,2 personal choice 5 so we can calculate the average number of this topic.