# Class 11 Math Chapter 1 MCQ Question Answer NCERT Solution

NCERT Class 11 Math Sets Chapter 1 MCQ Question Answer for Preparation of Exams. Here we Provide Class 11 Math Question Answer, Important Questions, MCQ for Various State Boards Students like CBSE, Haryana, uttar pradesh, mp and other state students.

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NCERT Class 11 Math Chapter 1 Sets MCQ Question Answer Solution.

## Sets Class 11 Math Chapter 1 MCQ Question Answer

1. If A = {3, 6, 9, 12}, B = {4, 6, 8, 10, 12} and X = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} is universal set, then the set (B – A)’ is :
(A) {4, 8, 10}
(B) {3, 9}
(C) {1, 2, 3, 5, 6, 7, 9, 11, 12}
(D) {1, 2, 4, 5, 6, 7, 8, 10, 11, 12}

Ans. (C) {1, 2, 3, 5, 6, 7, 9, 11, 12}

2. If G = {7, 8} and H = {5, 4, 2}, then number of subsets of G × H is :
(A) 6
(B) 16
(C) 32
(D) 64

Ans. (D) 64

3. A = {x : x is a prime number}, Set A is ………….. set.
(A) Finite
(B) Null
(C) Infinite
(D) None of the above

Ans. (C) Infinite

4. A = {a, e, i, o, u }. Number of subsets of set A is …………. .

(A) 5
(B) 20
(C) 32
(D) 120

Ans. (C) 32

5. If A = {a, b, c}, B = {a, b, c, d, e}, then A ∩ B = ……….. .
(A) A
(B) B
(C) neither A nor B
(D) both A and B

Ans. (A) A

6. In a school there are 20 teachers who teach Mathematics or Physics. Of these 12 teach Maths and 4 teach Maths and Physics. The number of teacher who teach Physics are …….
(A) 8
(B) 10
(C) 12
(D) 16

Ans. (C) 12

7. Which of the following statement is not correct? Given X is universal set, A and B are two sets :
(A) A – B ⊆ A
(B) A ∩ B ⊆ A ∪ B
(C) (A ∪ B)’ = A’ ∩ B’
(D) A’ ∩ B’ = A’ ∪ B’

Ans. (D) A’ ∩ B’ = A’ ∪ B’

8. A set contain n elements, then power set contains:
(A) n elements
(B) 2n elements
(C) n2 elements
(D) None of the above

Ans. (B) 2n elements

9. Let A = {1, 2, 3}, B = {3, 4}, C = {4, 5, 6}, then A ∩ (B ∪ C) is :
(A) {3}
(B) {1, 2, 3, 4}
(C) {1, 2, 5, 6}
(D) {Φ}

Ans. (A) {3}

10. If A and B are two disjoint sets, then n(A ∪ B) is equal to :
(A) n(A) + (B)
(B) n(A) + n(B) – n(A ∩ B)
(C) n(A) + n(B) – n(A ∩ B)
(D)n(A).n(B)

Ans. (A) n(A) + (B)

11. Two finite sets have m and n elements. The number of subsets of the first set is 112 more than that of the second . The values of m and n are respectively as:
(A) 7, 4
(B) 4, 4
(C) 4, 7
(D) 7, 7

Ans. (A) 7, 4

12. The number of elements in the set A = {(a, b) : a² + b² = 9, a, b ∈ z} is
(A) 4
(B) 2
(C) 3
(D) 1