ML Aggarwal Sets MCQs Class 7 ICSE Maths Solutions
ML Aggarwal Sets MCQs Class 7 ICSE Maths Solutions. We Provide Step by Step Answer of MCQs Questions for Sets as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-7.
ML Aggarwal Sets MCQs Class 7 Maths Solutions
| Board | ICSE |
| Publications | Avichal Publishig Company (APC) |
| Subject | Maths |
| Class | 7th |
| Chapter-5 | Sets |
| Writer | ML Aggarwal |
| Book Name | Understanding |
| Topics | Solution of MCQs |
| Edition | 2023-2024 |
Sets MCQs
ML Aggarwal Class 7 ICSE Maths Solutions
Page-113
Mental Maths
Question 1. Fill in the blanks:
(i) If x is not a member of the set A, then symbolically we write it as ……..
(ii) Each element of a set is listed once and only ……….. repetitions are removed.
(iii) A set that contains a limited number of different elements is called a ……… set.
(iv) Two finite sets are called equivalent if and only if they have ………. a number of elements.
Answer:
(i) If x is not a member of the set, A then symbolically we write it as x ∉ A
(ii) Each element of a set is listed once and only once repetitions are removed.
(iii) A set that contains a limited number of different elements is called a finite set.
(iv) Two finite sets are called equivalent if and only if they have equal number of elements
Question -2. State whether the following statements are true (T) or false (F):
(i) A collection of books is a set.
(ii) If X = {letters of the word PRINCIPAL}, then the cardinal number of set X is 9.
(iii) If P = {letters of the word AHMEDABAD}, then n(P) = 6.
(iv) If A is any set, then A ⊂ A.
(v) An empty set is a subset of every set.
(vi) If set A = {0}, then n{A} = 0.
(vii) If A and B are two sets such that A ⇔ B, then A = B.
Answer:
(i) A collection of books is a set. False
Correct:
A collection of different books is a set.
(ii) If X = {letters of the word PRINCIPAL}, then the cardinal number of set X is 9. False
Correct:
N(x) = P,R,I,N,C,A,L = 7 not 9
(iii) If P = { letters of the word AHMEDABAD },then n(P) = 6, True
{A, H, M , E, D, B}
(iv) If A is any set, then A ⊂ A. True
(v) An empty set is a subset of every set. True
(vi) If set A = {0}, then n{A} = 0. False
Correct: {n(A)=1}
(vii) If A and B are two sets such that A ⟺ B , then A = B. False
Correct: A = B is A ⟺ B but is A ⟺ B is not always A = B
Sets MCQs
ML Aggarwal Class 7 ICSE Maths Solutions
Page-114
Choose the correct answer from the given four options (3 to 9)
Question- 3. A set with a limited number of distinct elements is called
(a) a finite set
(b) an infinite set
(c) both finite as well as an infinite set
(d) none of these
Answer:
Set with a limited number of distinct elements is called a finite set. (a)
Question- 4. The symbol ↔ stands for
(a) belongs to
(b) is a subset of
(c) is equivalent to
(d) none of these
Answer:
The symbol ↔ stands for (c) is equivalent to
Question -5. The empty set is denoted as
(a) {Φ}
(b) { }
(c) {0}
(d) 0
Answer:
The empty set is denoted as (b) { }
Question -6. The cardinal number n(A) = for A = {x : x is an odd prime number less than 20} is
(a) 8
(b) 7
(c) 9
(d) 10
Answer:
The cardinal number n(A) = {x:x is an odd prime number less than
20} = { 3, 5, 7, 11, 13, 17, 19 }
n(A) = 7 (b)
Question -7. If A = {x | x is a positive multiple of 3 less than 20} and B = {x | x is a prime number less than 20}, then n(A) + n(B) is
(a) 6
(b) 8
(c) 13
(d) 14
Answer:
A = { x\x is a positive multiple of 3 less than 20 }
= { 3,6,12,15,18}
= n(A) = 6
B = {x\x is a prime number less than 20 }
= {2,3,5,11,13,17,19 }
= n(B) = 8
N(A) + n(B) = 6+8 = 14 (d)
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