Set Language English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

9th Standard

    Reg.No. :
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Maths

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. Number of subsets in set A = {1,2,3} is ________

    (a)

    3

    (b)

    6

    (c)

    8

    (d)

    9

  2. Sets having the same number of elements are called ___________

    (a)

    overlapping sets

    (b)

    disjoints sets

    (c)

    equivalent sets

    (d)

    equal sets

  3. The set of (A U B) - (A ก B) is ____________

    (a)

    (AUB)'

    (b)

    AΔB

    (c)

    (A∩B)'

    (d)

    A'UB'

  4. The number of elements of the set {x : x ∈ Z, x2 = I} is ________

    (a)

    0

    (b)

    1

    (c)

    2

    (d)

    3

  5. The shade region with adjoint diagram represents ___________

    (a)

    A - B

    (b)

    B - A

    (c)

    A'

    (d)

    B'

  6. Which of the following is true?

    (a)

    \(\left( A\cup B \right) =B\cup A\)

    (b)

    \({ \left( A\cup B \right) }^{ ' }{ A }^{ ' }{ -B }^{ ' }\)

    (c)

    \({ \left( A\cap B \right) }^{ ' }={ A }^{ ' }\cap { B }^{ ' }\)

    (d)

    \(A-\left( B\cap C \right) =\left( A-B \right) \cap \left( A-C \right) \)

  7. If A,B,C are non-overlapping sets,then n \(\left( A\cap B\cap C \right) \) is ___________

    (a)

    n(A) + n(B) + n(C)

    (b)

    \(n\left( A\cup B\cup C \right) \)

    (c)

    0

    (d)

    \(n\left( A\cap B \right) \)

  8. In a town 30% like only coffee,20% like only tea,10% like only like,15% like only any two of them,5% only like all the three. What is the percentage of people who like none them.

    (a)

    15%

    (b)

    20%

    (c)

    10%

    (d)

    5%

  9. \(\left( A\cup B\cup C \right) \cup \left( A\cup BC \right) ^{ ' }\)=_______

    (a)

    \(\Phi \)

    (b)

    A

    (c)

    U

    (d)

    \(A\cap B\cap C\)

  10. For any three sets,P,Q,R\(\left( P\cap Q \right) ^{ ' }\)

    (a)

    \({ P }^{ ' }\cup { Q }^{ ' }\)

    (b)

    \(P\cup Q\)

    (c)

    \({ P }^{ ' }\)

    (d)

    \({ Q }^{ ' }\)

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