Mathematics
If n(universal set) = 80 and n(A) = 50, then n(complement of set A) is :
80
50
30
none of these
Related Questions
If n(A - B) = 30, n(B - A) = 48 and n(A ∩ B) = 15, find n(A ∪ B).
If A = {3, 5, 7} and B = {5, 7, 9}, then n(A ∩ B) is :
6
2
4
none of these
If A = {5, 8, 10} and empty set ϕ. Then ϕ - A is equal to :
A
ϕ
{0}
none of these
If set A = {x : x ∈ W and 0 < x ≤ 4}, then set A is equal to :
{0, 1, 2, 3}
{0, 1, 2, 3, 4}
{1, 2, 3, 4}
none of these