alleryStart learning →A = {1}. Its universe changes from {1, 2} to {1, 2, 3}. What happens to A′?
AIt loses 2
BIt gains 3
CIt loses 3
DIt stays {2}
Answer & Solution
Correct answer: B. It gains 3
The complement changes from {2} to {2, 3} because 3 is now in the universe but outside A.
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