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?