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 smallest set A such that A ∪ { 1, 2 } = { 1, 2, 3, 5, 9 } is ________.
{ 3, 5, 9 }
{ 2, 3, 5 }
{ 1, 2, 5, 9 }
None of these
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 }
Let A = { factors of 36 } and B = { factors of 48 }, which of the following is true?
n(A∪B) = n(A) + n(B) - n(A∩B)
n(A∪B) = n(A) + n(B) + n(A∩B)
n(A∪B) = n(A) + n(B)
n(A∪B) = n(A∩B) - n(A) - n(B)
A combination of one or more simple statements with a connective is called a _____________.
sentence
conjunction
compound statement
disjunction
The number of outcomes when a dice and and a coin are thrown is _______.
2
4
12
A set which contains no element is called ___________.
infinite set
empty set
equal set
equivalent set
Number of outcomes when n coins are tossed is _______.
n2
2n
n
Let A = { factors of 36 } and B = { factors of 48 } find A∩B?
{ 1, 5, 7, 11 }
{ 1, 2, 3 }
{ 1, 2, 3, 4, 5, 6, 12 }
{ 1, 2, 3, 4, 6, 12 }
If a dice is thrown, the probability of getting an even number is __________.
1/3
1/2
1/6
