Overlapping Sets

Question 1

What MUST be true about columns or rows in set matrix?

Answer 1

they must be mutually exclusive

Question 2

When do you use set matrix?

Answer 2

For solving two set problems

Question 3

when integrating algebra into overlapping set problems, what you must be careful about?

Answer 3

pay close attention to the stem as the problem will us operating on some data rather than on total data

Question 4

how do you determine total number of items that belong to exactly one group for two set problems using set matrix?

Answer 4

cell 2 + cell 4

Question 5

how do you determine total number of items that do not belong to group A or group B?

Answer 5

cell 2 + cell 4 + cell 5

Question 6

Number of members in either set / A union B = ?

Answer 6

A + #B - #A intersection B

Question 7

What you should do to solve maximization or minimization questions within sets?

Answer 7

Test with extreme values

Question 8

How do you solve three overlapping sets problems?

Answer 8

by using Venn diagram

Question 9

formula for solving three sets when you know number of unique items?

Answer 9

unique = # exactly one group + # exactly two group + # exactly three group + #neither

Question 10

formula for solving three sets when you do not know number of unique items?

Answer 10

unique = A + B + C - (A and B + B and C + C and A) - 2 ( A, B and C) + neither

Question 11

thumb rule for using three sets formula

Answer 11

if you know #exact two group then use #unique = # exactly one group + # exactly two group + # exactly three group + #neither else #unique = A + B + C - (A and B + B and C + C and A) - 2 ( A, B and C) + neither