if n(A) = 10, n(B) = 6, n(A∩B) = 4, then n(A∪B) = ?
16
20
10
12
Set A and B have 3 and 6 elements respectively. What can be the minimum number of elements in A∪B?
3
6
9
18
The number of outcomes when a dice and and a coin are thrown is
2
4
Let S = { 0, 1, 5, 4, 7 }. Then the total number of subsets of S is
64
32
40
A combination of one or more simple statements with a connective is called a
sentence
conjunction
compound statement
disjunction
The statement of the form " If ... then... " is called
negation
implication
Let the Universal set be U = { x : x ∈ N, 10 ≤ x < 25 }. Write A = { x : x ≥ 20 }.
{ 1, 2, 3, 4, 5, 10, 15 }
{ 20, 21, 22, 23, 24 }
{ 10, 11, 12, 13, 14 }
{ 20 }
The negation of the statement "5 is a prime number" is
5 is a composite number
5 is a prime number
5 is not a prime number
both (2) and (3)
If U = { 1, 2, 3, 4, 5, 6, 7, 8 }, A = { 1, 2, 3, 4 }, B = { 2, 4, 5, 7 } and C = { 2, 4, 6, 8 }. Then (A∩B)′ ?
{ 1, 3 }
{ 2, 4 }
{ 1, 3, 5, 6, 7 }
{ 1, 3, 5, 6, 7, 8 }
Which of the following represent the empty set?
{ }
0
{ 0 }
None of these
