(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
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