Finding the probability of each event in a group of events of different possibility.
The following table summarizes a survey involving the relationship between living arrangements and grade point average for a group of students.

On Campus

At Home

Apartment

Totals

Below 2.5

98

40

44

182

2.5 to 3.5

64

25

20

109

Above 3.5

17

4

8

29

Totals

179

69

72

320

If a student is selected at random, what is the probability that:
1. the student lives on campus?
2. The student has a grade point average below 2.5?
3. The student lives on campus and has a grade point average below 2.5?