CBSE  /  Class 11  /  Maths  /  Sets

  • 1. 
    If A, B and C are any three sets, then A – (B ∪ C) is equal to

  • (A – B) ∪ (A – C)
  • (A – B) ∪ C
  • (A – B) ∩ C
  • (A – B) ∩ (A – C)

  • 2. 
    (A’)’ = ?

  • ∪ – A
  • A’
  • ∪
  • A

  • 3. 
    A – B is read as?

  • Difference of A and B of B and A
  • None of the above
  • Difference of B and A
  • Both a and b

  • 4. 
    If A, B and C are any three sets, then A × (B ∪ C) is equal to

  • (A × B) ∪ (A × C)
  • (A ∪ B) × (A ∪ C)
  • None of these
  • (A × B) ∩ (A × C)

  • 5. 
    IF A = [5, 6, 7] and B = [7, 8, 9] then A ∪ B is equal to

  • [5, 6, 7, 8, 9]
  • [5, 6, 7]
  • [7, 8, 9]
  • None of these

  • 6. 
    Which of the following sets are null sets

  • {x: |x |< -4, x ?N}
  • 2 and 3
  • Set of all prime numbers between 15 and 19
  • {x: x < 5, x > 6}

  • 7. 
    IF R = {(2, 1),(4, 3),(4, 5)}, then range of the function is?

  • Range R = {2, 4}
  • Range R = {1, 3, 5}
  • Range R = {2, 3, 4, 5}
  • Range R {1, 1, 4, 5}

  • 8. 
    The members of the set S = {x | x is the square of an integer and x < 100} is

  • {0, 2, 4, 5, 9, 58, 49, 56, 99, 12}
  • {0, 1, 4, 9, 16, 25, 36, 49, 64, 81}
  • {1, 4, 9, 16, 25, 36, 64, 81, 85, 99}
  • {0, 1, 4, 9, 16, 25, 36, 49, 64, 121}

  • 9. 
    In a class of 120 students numbered 1 to 120, all even numbered students opt for Physics, whose numbers are divisible by 5 opt for Chemistry and those whose numbers are divisible by 7 opt for Math. How many opt for none of the three subjects?

  • 19
  • 41
  • 21
  • 57

  • 10. 
    {(A, B) : A² +B² = 1} on the sets has the following relation

  • reflexive
  • symmetric
  • none
  • reflexive and transitive
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