Question 1165382: U = {1, 2, 3, 4, 5, 6, 7}
A = {1, 2, 4, 5}
B = {1, 3, 5, 7}
How many elements are in (A' ∪ B)' ?
Answer by Edwin McCravy(20060)   (Show Source):
You can put this solution on YOUR website! U = {1, 2, 3, 4, 5, 6, 7}
A = {1, 2, 4, 5}
B = {1, 3, 5, 7}
How many elements are in (A' ∪ B)' ?
(A' ∪ B)'
Substitute the sets for the letters
({1, 2, 4, 5}' ∪ {1, 3, 5, 7})'
{1, 2, 4, 5}' means to put all the OTHER elements of U in a set
and none of these:
({3, 6, 7} ∪ {1, 3, 5, 7})'
The ∪ means to combine both sets into one:
({1, 3, 5, 6, 7})'
The ' means to put all the OTHER elements of U in a set and none of
these
{2, 4} contains 2 elements <--answer
Edwin
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