Sets and functions

Class 10 · Mathematics · 6 questions

Name: ____________________ Date: ____________

If A = {1, 2, 3} and B = {3, 4}, what is A union B?
- A {3}
- B {4}
- C {1, 2, 4}
- D {1, 2, 3, 4}
If A = {1, 2, 3} and B = {3, 4}, what is A intersection B?
- A {3}
- B empty set
- C {1, 2, 3, 4}
- D {1, 2}
The number of subsets of a set with 3 elements is:
- A 6
- B 8
- C 3
- D 9
If f(x) = 2x + 3, what is f(4)?
- A 8
- B 14
- C 11
- D 7
A relation in which every input has exactly one output is a:
- A Function
- B Set
- C Matrix
- D Ratio
If A has 4 elements and B has 3 elements, how many elements are in A x B?
- A 12
- B 81
- C 7
- D 1

Answer key

1. D, 2. A, 3. B, 4. C, 5. A, 6. A