Selina Concise Class 7 Math Chapter 13 Set Concepts Exercise 13B Solution
EXERCISE 13B
(1) Write the cardinal number of each of the following sets:
(i) n A = 366
Contents
Selina Concise Class 7 Math Chapter 13 Set Concepts Exercise 13B SolutionEXERCISE 13B(1) Write the cardinal number of each of the following sets:(2) For each set, given below, state whether it is finite set, infinite set or the null set:(3) State, which of the following pairs of sets are disjoint:(4) State whether the given pairs of sets are equal or equivalent:(5) Examine which of the following sets are the empty sets:(6) State true or false:(7) Which of the following represents the null set?
(ii) n B = 12
(iii) n C = 7
(iv) n D = 5
(v) n E = 3
(vi) n F = 7
(vii) n G = 5
(2) For each set, given below, state whether it is finite set, infinite set or the null set:
(i) Infinite
(ii) Ф
(iii) Finite
(iv) Infinite
(v) Infinite
(vi) Ф
(vii) Infinite
(viii) Finite
(ix) Ф
(x) Finite
(3) State, which of the following pairs of sets are disjoint:
(ii) {birds} and {tress}
(4) State whether the given pairs of sets are equal or equivalent:
(i) Equivalent
(ii) Equal
(iii) Equivalent
(iv) Equivalent
(v) None
(vi) Equivalent
(vii) Equal
(viii) Equal
(ix) None
(5) Examine which of the following sets are the empty sets:
(ii) and (iii)
(6) State true or false:
(i) True
(ii) True
(iii) False
(iv) True
(v) False
(vi) False
(vii) False
(viii) False
(ix) True
(x) True
(7) Which of the following represents the null set?
Ans: Ф and { }