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)

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Re: Probability and Statistics homework problem question

(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

Re: Probability and Statistics homework problem question

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