Question

Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set
a) A ∩ B
b) A U C
c) B U C
d) (A U B) ∩ C
e) A U (B U C)
f) (A ∩ B) ∩ C
g) (A ∩ B) U C

Answer 1

a) 3 is the only element in both
b) 1,2,3,5,7 are in one or the other
c) 3,5
d) 1,2,3,4,5,6 intersects 3,5,7 at 3,5
e)everything from 1 to 7 is in at least one set
f) 3 is the only element in A intersects B. 3 is also in C so the answer is 3.
g) 3, 5, 7

Answer 2

thanks Damon, i understand it a little better now :)