If U is the universal set and A is any set what is U intersection A=...........

Is the universal set unique ?

If u is the universal set and A sub U then fill in the blanks : (i) A cup A' = ....... (ii) A cap A '=....... (iii) phi' cap A=..... (iv) U' cap A =........

If U is the universal set and A sube B sube U then which of the following is true?

If A is universal set, then ((A')')' is_______

Given n(U) = 20, n(A) = 12, n(B) = 9, n(AnnB) = 4, where U is the universal set, A and B are subsets of U, then n((AuuB)') equals

If E is the universal set and A=BuuC , then the set E-(E-(E-(E-(E-A)))) is same as the set