Thread: Probability and Statistics homework problem question

Example 1: Computers, fine arts, economics - this one requires using system of equations

There are 500 seniors.
210 are enrolled in computers
80 do not need any of the 3
80 are taking only fine arts.

180 are taking fine arts.
36 taking only economics and computers
10 taking only fine arts and computers
220 taking economics

Find:
1.) P(only taking economics)
2.) P(economics and fine arts)
3.) P(taking all 3 classes)

(View the picture to understand how i got the system) So, you have



the system
1) x + 10 + y + 36 = 210
2) 80 + 10 + z + y = 180
3) 36 + z + y + t = 220
4) x + 10 + y + 36 + t + z + 80 = 420

4 Systems, 4 variables, solve

how would i go about and solve this....