Ch. 12 Overlapping Sets

Question 1

Total Unique Elements formulas

Answer 1

= Only A + Only B + Both + Neither
= Total A + Total B - Both + Neither

Question 2

What does the matrix look like for overlapping sets?

Answer 2

A Not A
B Total B
Not B Total Not B
Total A Total Not A Total

Question 3

If you can’t remember the total unique elements formulas, how do you use the matrix to solve?

Answer 3

Set up the matrix, plug in the numbers, then you know the end of each row & column is a total, so you can +/- rows until you get to the answer.

Question 4

How do you solve an overlapping sets with fractions?

Answer 4

You can make the total = LCM of the denominators and then assign numbers to each of the fractions.
OR make total = 100
OR just assign a variable to the total = T, and then do the fraction of the total.

Question 5

What does Either A or B mean?

Answer 5

Only A + Only B + Both A&B