Question 920171: So we are working on sets and probability and I'm completely lost. HELP please!
Let U = {-8, -4, -2, 2, 5, 8, 10, 13, 17, 18}, A = {-8, -2, 5, 10, 17}, B = {-4, 2, 8, 13, 18}, and C = {-8, -4, 2, 5, 13, 17}. Find each set. (Enter ∅ for the empty set.)
(a) C ∩ Cc
Correct: Your answer is correct.
(b) (A ∩ C)c
(c) A ∪ (B ∩ C)
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! Do you know what ∩ (intersection) and ∪ (union) are?
A ∩ B := set of all elements that are in A *and* B
A ∪ B := set of all elements that are in A *or* B (or both)
The lowercase c denotes "complement" in this case (relative to U, universe), i.e. X^c gives the set of elements in the universe U that are *not* in X.
Given these definitions, the problems are very straightforward.
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