ML AGGARWAL CLASS 7 Chapter 5 Sets EXERCISE 5.2

EXERCISE 5.2

Question 1

i) Finite set having seven colours

ii)Empty set , having no element in between 

iii) Infinite set , having infinite elements 

iv) Infinite set 

v) Finite set, Having finite digits i.e 6

vi)Finite set, having 6 letters 

vii)Infinite Set , have infinite numbers 

viii)Finite set , have 8 prime factors

ix) Empty set, have no vowel in the word

x)Finite set , 12 element in it .

Question 2

(i),(ii),(iii),(iv) represent same sets 

(iv) is different from other sets

Question 3

A, B and E are equal 

C,F and H are equal 

D and G are equal 

Question 4

A, C , E and G are equivalent , These are having 7 elements 

B and D are equivalent , having 3 element 

F and H are equivalent , having 12 element 

I and J are equivalent , having 52 elements

Question 5

i) $A \subset B, B C A, A=B$

ii) $A \subset B$ but $B \& A$

iii) $B  \subset A$ but $A \subset B$

iv) neither $A \subset B$ nor $B \subset A$

Question 6

i) False

ii) False

iii) True, because there are 5 elements in each

Question 7

i) $\phi$

ii) $\phi,\{3\},\{5\},\{3,5\}$

iii) $\phi,\{2\},\{4\},\{6\},\{2,4\},\{4,6\},\{2,6\}$,{2,4,6}

Question 8

i) $\xi=N$

$A=\{2,4,6,8\}$

ii) $\quad \xi=W$

$A=\{0,2,4,6,8\}$

iii) $\xi=d$

$A=\{\ldots,-4,-2,0,2,4,6,8\}$