Question
A´ is defined as the complement of A, as in, set of all elements that are part of the universal set but not in A. How many of the following have to be true
i. n(A ∪ B)' = n(A' ∩ B')
ii. If A ∩ B=0}, then A' ∪ B'} is equal to the universal set
iii. If A ∪ B = universal set, then A' ∩ B' should be the null set.
iv. If A ⊂ B then A' ∪ B'=(A ∩ B)'
CAT 2021
Solution
Correct option is
(D)
