Set Language One Mark Questions

9th Standard

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Maths

Time : 00:30:00 Hrs
Total Marks : 10
    10 x 1 = 10
  1. If U={x:x\(\in \)N and x<10}, A={1, 2, 3, 5, 8} and B={2, 5, 6, 7, 9}, then \(n\{ (A\cup B)'\} \) is

    (a)

    1

    (b)

    2

    (c)

    4

    (d)

    8

  2. For any three sets P, Q and R, P-(Q\(\\ \cap \)R) is

    (a)

    P-(Q\(\cup \)R)

    (b)

    (P\(\\ \cap \)Q)-R

    (c)

    (P-Q)\(\cup \)(P-R)

    (d)

    (P-Q)\(\\ \cap \)(P-R)

  3. For any three sets A, B and C, (A−B)∩(B −C) is equal to

    (a)

    A only

    (b)

    B only

    (c)

    C only

    (d)

    ф

  4. If J = Set of three sided shapes, K = Set of shapes with two equal sides and L = Set of shapes with right angle, then J ∩ K ⋂ L is

    (a)

    Set of isoceles triangles

    (b)

    Set of equilateral triangles

    (c)

    Set of isoceles right triangles

    (d)

    Set of right angled triangles

  5. If A and B are two non-empty sets, then (A-B)U(A⋂B) is

    (a)

    A

    (b)

    B

    (c)

    ф

    (d)

    U

  6. The shaded region in the venn diagram is

    (a)

    \(A\cup B\)

    (b)

    \(A\cap B\)

    (c)

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

    (d)

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

  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. If U={x:x\(\in \)W and x<20},A={2,4,,6,8},B={6,8,12,14} then \(\left[ n\left( A\cup B^{ ' } \right) \right] \)

    (a)

    15%

    (b)

    20%

    (c)

    10%

    (d)

    5%

  9. 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%

  10. \(\left[ n\left( A\cup B\cup C \right) ^{ ' } \right] \)=_______

    (a)

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

    (b)

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

    (c)

    n(U)

    (d)

    \(\Phi \)

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